In the first experiment we investigated the specific heat of water. To have students graph the temperature of water as it. You are to record your temperature every minute in degrees celsius. This is the student edition of the lab that graphs data from the heating and cooling of lauric acid keywords. Water is a material on earth that can be found in each of the 3 phases solid, liquid, gas phase changes when matter changes state by absorbing or releasing energy. Chemical x heating curve 600 500 400 bp 300 mp 200 100 so time heat energy applied the heating curve shown above is a plot of temperature vs. Heating curve of water the graph is not to scale but it is drawn to. Heating curve of water the phase transitions of water. Remove the water from the heat and measure the temperature every 1 minute, until the beaker is cool to touch. You will use these results to plot your own heating curve for water. Since temperature is the average kinetic energy, the temperature of the solid increases.
Your goal is to investigate the phase change of water by recording temperature at. Lab report for water experiment linkedin slideshare. To study the effects of heating and cooling a pure substance through a change of phase. Prepare 150ml cold water bath in a second beaker half ice and half water. If constant heat is added to ice water, what changes will take place and at what temperatures. Heating curve for water pennsylvania state university. In this activity, you will be heating a beaker of crushed ice while the ice becomes water and the water becomes vapor. View lab report heating curve for water, lab from chem 127 at central regional high. Feb 21, 2014 if you are using a bunsen burner for the heating curve i would put something like. Set the time to 0 minutes and record the exact temperature of the sample and immerse it below the water level in the hot water bath. On your graph, indicate the times and temperatures for steps 8 and 9 above.
Looking from left to right on the graph, there are five distinct parts to the heating curve. Apparatus beakers ice bunsen burner thermometer water chipa thomas maimelas insight. Adjust the hotcold water faucets so that the running water is. Chemistry investigation heating curve of water prezi. You will write a formal lab report for this experiment. The water was heated by use of an electric current passing through a resistor. This was proved by graphing the change in temperature and change in energy and the graph showing a straight, diagonal line showing the proportionality of heat capacity. Examine the heating curve of water and determine what is happening at each stage. For example, this is the heating curve for iron, a metal that melts at 1538c and boils at 2861c. What would the hypothesis be for doing a heating and. The heating curve shown above is a plot of temperature vs time. Heating curve of water the lesson is inquiry based, asking students.
Heating curve of water lab student linkedin slideshare. Answer the following questions using this heating curve. Read and record the temperature of the sample every 30 s. Compare and explain the heat energy of different systems. The part of the graph labeled e represents temperatures at which gas is being heated. Nnin nanotechnology education heating curve for water with. Heating curve for water, lab heating curve for water. To practice techniques of heating materials using the bunsen burner. Adjust the hot plate so that you can maintain the temperature of the water at about 60oc. Heating and cooling curves also called temperature curves. Heat of fusion heat energy goes into the vibration motion of the molecule, increasing its kinetic energy. Heating curve lab santa ana unified school district.
Starting with the substance in its liquid phase at a temperature well above its freezing point, temperature readings will be made at regular intervals until the substance changes to its solid phase and cools to a temperature. Oct 23, 20 heating curve of water lab materials thermometer thermometer clamp ring stand hot plate large beaker ice procedure use the setup to the right to set up your experiment. How much energy in kj is required to completely vaporize 200. Figure \\pageindex3\ shows a heating curve, a plot of temperature versus heating time, for a 75 g sample of water. The temperature remains constant during these phase transitions.
This is an amazing curve and one worth staring at for a while. Since temperature is the average kinetic energy, the temperature of the solid increaes. Heating curve and cooling curve of water enthalpy of fusion. It represents the heating of what is initially ice at 10oc at a near constant rate of heat transfer. The length of the line of the heating curve for water at 100 c is the amount of heat required to change all of the liquid into a. Heating curve of water lab free download as word doc. Place a sample of sodium thiosulfate and labquest probe in a test tube.
What happens to the temperature of water when it is melting. Everything you need for the successful completion of this lab. Worksheet heating curve of water calculations involving phase changes write all answers on your own answer sheet. In what part of the curve would substance x have a definite shape and definite volume. Mar 21, 2012 while the water was being heated, the sample in the test tube was cooling to approximately room temperature. The added energy goes to overcoming the intermolecular forces of attraction holding the water molecules together as a liquid, increasing the distance between molecules the potential energy of the system increases.
Heating curve worksheet buford high school chemistry. Heating curve of water the phase transitions of water step 1. This lab is included in a moneysaving bundle of labs called 15 mustdo chemistry labs. Heating and cooling curves of stearic acid using thermometer lab purpose. Although we might expect the cooling curve to be the mirror image of the heating curve in figure \\pageindex3\, the cooling curve is not an identical mirror image. Use the data to make a graph to determine the boiling point of water.
How does this lab relate to kinetic molecular theory. Chemistry, lab, laboratory, lessons, school, lesson plan, heating, cooling, curves, lauric acid, safer, labs created date. Copy into your lab report using a ruler to make it neat and tidy. The cooling curve, a plot of temperature versus cooling time, in figure \\pageindex4\ plots temperature versus time as a 75 g sample of steam, initially at 1 atm and 200c, is cooled. To study the effects of heating a substance through two phase changes. Heating curve calculations in the heating and cooling curves we learned that energy is absorbed by a substance as it warms up, melts fusion or boils vaporization and energy is released from a substance as it cools down, condenses, or freezes. Heating and cooling curve of stearic acid lab introduction stearic acid will be cooled heat removed at a constant rate. If the temperature is lowered, the particles will move slower causing the kinetic energy to lower. A heating or cooling curve is a simple line graph that shows the phase. A good example that most people are familiar with is the heating of water. This graph goes in your quantitative observations section. Use the setup to the right to set up your experiment. Lets examine the heat and enthalpy changes for a system undergoing physical change. Calorimetry qmcat allows us to calculate the energy changes as a substance warms or cools.
Heating curve of water lab student welcome to science. The increase in temperature causes the water to change from a solid to a liquid. It represents the heating of substance x at a constant rate of heat transfer. For water, this temperature is 100c because the boiling point for water is 100c.
From your heating curve, report the melting point and boiling point of water. Find heating curve lesson plans and teaching resources. Fill one beaker about 23 full of warm tap water and place on hot plate. Heating and cooling curves how do i get rid of waste. As heat is added to water, the temperature increases which increases the kinetic energy of the molecules. To understand that a phase change is a physical change. Five step problem for water melting point boiling point heat of fusion heat of vapor. Instead of just memorizing a heating cooling curve they see in a textbook, students create their own. Nect gr 10 heating and cooling curve of water youtube.
After 1 minute measure the temperature again and record it. As heat is steadily added to the ice block, the water molecules will begin to vibrate faster and faster as they absorb kinetic energy. What would the hypothesis be for doing a heating and cooling. Heat energy goes into the vibration motion of the molecule, increasing its kinetic energy. Oct 08, 2019 in this lab, students will create a phase change graph by adding and removing heat to observe and record data during actual phase changes.
Complete answer key containing sample data, sample graph, and all answers. Worksheet heating curve of watercalculations involving phase changes write all answers on your own answer sheet. A rehab the lab lesson plan that creates less hazardous waste, improves lab safety and helps reduce exposure. For one mole of water 18 g, we have the following data. Heating curve worksheet heating curve of substance x 10 12 14 16 18 20 22 24 26 28 30 time minutes the heating curve shown above is a plot of temperature vs time. Heating curve for water, lab heating curve for water hayden. Water is a material on earth that can be found in each of the 3 phases solid, liquid, gas phase changes when matter changes state by. Plot a graph of time versus temperature for the heating of ice. Heating curve of water lab materials thermometer thermometer clamp ring stand hot plate large beaker ice procedure use the setup to the right to set up your experiment.
To graph the heating curve of water, and to use the graph to determine the melting and boiling point for water. What is the freezing temperature of the above substance. We are trying to find out if water takes longer time to cool down if the starting temperatures are different. Electrical heating allowed us to determine the heat entering the system to a high accuracy. For example, this is the heating curve for iron, a metal that. Boil 150 ml of water and record the temperature of the water in increments of sixty seconds. What is the melting temperature of the above substance.
I predict that as the time increases the temperature of the water will increase due to the heat expelled from the bunsen burner or other heat source. Heat on hot plate until water temperature reaches 85oc turn hot plate off at this temperature. Once all the ice has been converted to liquid water, the temperature of the. Heating curve of water 30 favorites activity in melting point, freezing point, phase changes, molecular motion, heat, specific heat, temperature, intermolecular forces, heating curve, boiling point, heat of vaporization, heat of fusion, aact. Throughout this experiment the heat capacity of water was proven to be proportional. Honors chemistry archive 20192020 ms raymond chemistry. In part i of this experiment, changes in the state of matter will be examined by. Heating curve of water lab sketch a graph of temperature on the yaxis versus time on the xaxis based on the results of your experiment. The rate of temperature increase depends on the heat capacity of the solid. Heating curve for water introduction to chemistry lumen learning. Different substances have different melting points and boiling points, but the shapes of their heating curves are very similar. Solid ice is heated and the temperature increases until the normal freezingmelting point of zero degrees celsius is reached. Your goal is to investigate the phase change of water by recording temperature at different times while heating the ice in the beaker.
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