Enter your Name:   Enter your E-mail Address:  01. Why does a person do no work if he or she pushes against a car that is too heavy to move? 02. Write the first law of thermodynamics in your own words. Use it to explain where the flame of a burning candle gets its heat. 03. Explain the difference between kinetic and potential energy. Give at least one example of each. 04. What is the relationship between a food Calorie and a chemistry calorie? 05. If the temperature of an object starts to increase, is the object gaining or losing energy? 06. What two units do we use for measuring energy? What is the relationship between them? 07. Convert 100.0 K to both Celsius and Fahrenheit. 08. The specific heat of plastic is fifty times larger than the specific heat of lead and ten times larger than the specific heat of stone. Equal masses of lead, plastic, and stone have the same initial temperature. They are each given the same amount of energy. Which ends up the hottest? 09. Many recipes call for cooking food at a very constant temperature of 212° F (100° C). Why do these recipes recommend that you boil the food to achieve this constant temperature? 10. A 10.0 kg copper skillet (c = 0.3851 J / g * C) must be heated from room temperature (25.0° C) to a temperature of 175.0° C. How many Joules of heat are required? 11. A 1.50 kg iron object (c = 0.4521 J / g * C) at 110.0° C releases 5,505 Joules of heat. What is its new temperature? 12. If a 50.0 g object needs 1,145 Joules to increase its temperature by 10.0° C, what is its specific heat capacity? 13. What are the basic components of a calorimeter? Briefly describe how a calorimetry experiment is done and what you can learn from it. 14. In a calorimetry experiment, a calorimeter is filled with 125 grams of water. The initial temperature of the water is 22.3° C. A 50.0 g chunk of metal at 123.0° C is dropped into the calorimeter, and the temperature increases to 24.5° C. What is the specific heat capacity of the metal? You can ignore the heat absorbed by the calorimeter. 15. In a calorimetry experiment, an unknown mass of glass (c = 0.8372 J / g * C) at 90.0° C is dropped into a calorimeter (c = 1.23 J / g * C), m = 7.0 g) that contains 75.0 g of water. If the temperature increases from 24.3° C at the beginning of the experiment to 26.6° C by the end, what was the mass of the glass?