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- 1. Multiple ChoiceFor the formula:
Q= m c ∆T
The units for specific heat are:g /J C°C/g JkJ/gJ/g°C - 2. Multiple Choice
What would be the effect on the particles if more heat is supplied to the system?They would slow downThey would stop movingThey would speed upThere would be no effect - 3. Multiple Choice
If two objects have different temperatures when they come in contact, heat will flow from the warmer object to the cooler one UNTIL ____________
one reaches a temperature of zero
they both have an equal temperature
one runs out of energy
- 4. Multiple ChoiceThe total energy of all the particles in a substance is called:temperaturethermal energydegreesmass
- 5. Multiple Choice
If the specific heat of water is 4.18 J/g∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C? (show your work)
-80,256 J
80.256 J
80,256 J
-80.256 J
- 6. Multiple ChoiceWhat is the specific heat of an unknown substance if 100.0 g of it at 200.0 °C reaches an equilibrium temperature of 27.1 °C when it comes in contact with a calorimeter of water. The water weighs 75. g and had an initial temperature of 20.00 °C? (Specific heat of water is 4.18 J/g°C) (show your work)0.111 J/g°C1.29 J/g°C0.129 J/g°C22225.85 J
- 7. Multiple Choice
For a skillet, used for cooking, do you want a high or low specific heat
High, so that it will need more energy to heat up
Low, so that it will change temperature quickly
- 8. Multiple ChoiceThe SI unit of heat and energy is the __________.calorieheatjoulewatt
- 9. Multiple ChoiceA sample of iron receives 50.J of heat energy that raises the temperature of the iron by 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample? (show your work)25g30g20g50g
- 10. Multiple ChoiceA reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction. If the temperature began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius. Is the reaction endothermic or exothermic?ExothermicEndothermic
- 11. Multiple ChoiceCalorimetry Question:
A piece of metal with a mass of 32.8 g is heated to 100.5°C and dropped into 138.2 g of water at 20.0°C. The final temperature of the system is 30.2°C. What is the specific heat capacity of the metal? (show your work)2.56 J/g°C0.391 J/g°C5.29 J/g°C3.50 J/g°C - 12. Multiple ChoiceIn an exothermic process, the surroundings are gaining energy.TrueFalse
- 13. Multiple Choice
What does "q" mean?
A measure of heat energy
A change in heat energy
A measure of kinetic energy
A change in temperature
- 14. Multiple ChoiceWhat is a tool that measures the heat of chemical reactions?calorimetercalorieStyrofoam™ cupnone of these
- 15. Multiple ChoiceCalorimeters use insulating materials to:encourage affordable materials in science experiments in schools.preserve the heat of the environment outside the Styrofoam cup.prevent heat from escaping to the environment.keep the liquid inside the Styrofoam cup from overheating.
- 16. Multiple ChoiceA metal cube at temperature of 10°C immersed in a liquid at temperature of 70°C.
What is the temperature of the metal cube when thermal equilibrium is achieved between the cube and the liquid?Between 10°C and 70°CMore than 70°CLess than 10°CSame as the room temperature - 17. Multiple Choice
The specific heat of water is 4.18 J/g°C.
If 980. J of energy is added to 6.20 g of water at 18.0 °C, what is the final temperature of the water?
37.8 °C
-19.8 °C
19.8 °C
55.8 °C
- 18. Multiple Choice
What does "ΔT" mean?
A change in health
A change in heat
A change in height
A change in temperature
- Answer choicesTagsAnswer choicesTags