Calorimetry Lab Questions With Answers Latest Updated 2022 Already Passed

Student Exploration: Calorimetry Lab Vocabulary: calorie, calorimeter, joule, specific heat capacity Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. The Latin word calor means “heat,” and meter comes from the Greek word meaning “to measure.” What do you think a calorimeter does? ________________________________ _________________________________________________________________________ 2. Where have you heard the word calorie before? What do you think a calorie is? _________ _________________________________________________________________________ Gizmo Warm-up A calorimeter is an insulated container filled with a liquid, usually water. When a hot object is placed in the calorimeter, heat energy is transferred from the object to the water and the water heats up. Calorimeters can be used to find a substance’s specific heat capacity. You will use the Calorimetry Lab Gizmo to determine the specific heat capacities of various substances. 1. On the SIMULATION pane, select Copper. Use the slider to set its Mass to 200 g. Set the Water mass to 200 g. Check that the Water temp is set to 30.0 °C and the copper’s Temp is 90 °C. Select the GRAPH tab, and click Play ( ). A. What was the Final temperature of the copper and the water? _________________ B. How much did the temperature of the copper change? ________________________ C. How much did the temperature of the water change? _________________________ 2. Specific heat capacity can be described as a substance’s resistance to temperature changes. Which substance has a greater specific heat capacity, copper or water? Explain. _________________________________________________________________________ to measure heat when looking at the nutritional facts on the back of a food container 34.96 55.04 4.96 water, because its temperature only changed by 4.96 compared to 55.04 2018 _________________________________________________________________________ Activity A: Heat transfer Get the Gizmo ready: ● Click Reset ( ). Question: What factors determine how heat energy transfers between objects? 1. Predict: In the Gizmo warm-up, you saw how 200 g of 90 °C copper transfers heat to 200 g of 30.0 °C water. A. How do you think increasing the water’s mass would affect the final temperature? ___________________________________________________________________ ___________________________________________________________________ B. How do you think decreasing the copper’s mass would affect the final temperature? ___________________________________________________________________ ___________________________________________________________________ C. How do you think increasing or decreasing the copper’s initial temperature would affect the final temperature? ____________________________________________ ___________________________________________________________________ 2. Collect data: Use the Gizmo to determine the final temperature for each set-up listed below. Record your results in the tables. In the first table, you experiment with changing the water’s mass. In the second table, you change the copper’s mass. In the third table, you change the initial temperature of the copper. The first row of each table has been completed for you. Copper Water Final Temp. (°C) Initial Temp. (°C) Mass (g) Initial Temp. (°C) Mass (g) 3. 90 °C 200 g 30.0 °C 200 g 34.96 °C 90 °C 200 g 30.0 °C 2,000 g 4. 90 °C 200 g 30.0 °C 200 g 34.96 °C 90 °C 20 g 30.0 °C 200 g I think that will make the temperature drop I think temperature will also drop It wouldn't affect it that much since the specific heat capacity is larger on water 30.54 30.54 2018 5. 90 °C 200 g 30.0 °C 200 g 34.96 °C 100 °C 200 g 30.0 °C 200 g 50 °C 200 g 30.0 °C 200 g (Activity A continued on next page) 35.79 31.65 2018 Activity A (continued from previous page) 3. Analyze: For each factor listed in the chart below, explain how the final temperature was changed and why you think that change occurred. A. What was the effect of increasing the water’s mass? _________________________ ___________________________________________________________________ B. What was the effect of decreasing the copper’s mass? _______________________ ___________________________________________________________________ C. What was the effect of changing the initial temperature of the copper? ___________ ___________________________________________________________________ ___________________________________________________________________ 4. Draw conclusions: The amount that the water’s temperature increases depends on the mass of the water and the amount of heat energy in the copper. A. How does changing the initial mass of the copper affect how much heat energy it has? _______________________________________________________________ ___________________________________________________________________ B. How does changing the initial temperature of the copper affect how much heat energy it has? _______________________________________________________ ___________________________________________________________________ 5. Apply: Many gyms and health clubs have steam saunas, which are small steam-filled rooms. Traditionally, steam saunas have a container of heated rocks. A small ladle of water is poured on the rocks in order to make the steam. A. Use what you have learned so far about heat transfer to explain how hot rocks can be used to make steam? _______________________________________________ ___________________________________________________________________ B. Why do you think only a small ladle-full of water is poured on the rocks at one time? ___________________________________________________________________ the temp. drops quicker Its specific heat capacity becomes weaker. it doesn't have much to resist so the temp. drops i think its the most important part; how much mass the object has. the more mass, the longer the temperature will last. it doesn't affect the amount of heat energy as much. Its more about the mass. well the rocks are heavy and have a lot of mass. they can retain a lot of heat and transfer it to the water; evaporating it. so that way the rocks' temperature does not dissipate. 2018 ___________________________________________________________________ 2018 Activity B: Specific heat Get the Gizmo ready: ● Click Reset. ● Deselect Copper, and select Granite. Question: How can you compare the specific heat capacities of various substances? 1. Explain: How do you think you can use the calorimeter to compare the specific heat capacities of the substances listed on the Gizmo? _________________________________ _________________________________________________________________________ _________________________________________________________________________ 2. Predict: Which substance do you think will have the highest specific heat capacity? Why? _________________________________________________________________________ _________________________________________________________________________ 3. Experiment: Use the Gizmo to determine the final temperature for each set-up listed below. Record your results in the table. The first row has been completed for you. Substance Substance initial temp. (°C) Substance mass Water initial temp. (°C) Water mass Final temp. (°C) Copper 90 °C 200 g 30.0 °C 200 g 34.96 °C Granite 90 °C 200 g 30.0 °C 200 g Lead 90 °C 200 g 30.0 °C 200 g 4. Analyze: Of the three substances, which caused the largest temperature change in the water? What does this indicate about its relative specific heat capacity? ________________ _________________________________________________________________________ 5. Interpret: Remember that specific heat capacity is a measure of a substance’s resistance to temperature change. The more resistant a substance is to temperature change, the higher is its specific heat capacity. You can use different masses, initial temperatures, and different substances in a conrolled enviroment to se the temps. change. Ice, the atoms are closely packed together. 39.59 31.75