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- 1. Multiple ChoiceIn an exothermic process the surrounding looses heat.TrueFalse
- 2. Multiple ChoiceIn an endothermic reaction the system is releasing energy.TrueFalse
- 3. Multiple ChoiceAs someone is running on the track they begin to perspire. If the runner is our system, are they endothermic or exothermic?Endothermic processExothermic process
- 4. 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. If the reaction is our system, is the system endothermic or exothermic?ExothermicEndothermic
- 5. Multiple ChoiceThe amount of energy required to raise the temperature 1ºC for every kilogram is called____?Thermal EnergySpecific HeatTemperatureKinetic Energy
- 6. Multiple ChoiceWhat unit do you use to measure Thermal Energy?J/Kg ºCKgºCJ
- 7. Multiple ChoiceWhat is the equation to measure change in Thermal Energy?Q=mc∆tQ=mcQ= ∆mctm=QC
- 8. Multiple ChoiceA material was cooled from 100ºC to 40ºC. What is the temperature change?60ºC40ºC-60ºC-40ºC
- 9. Multiple ChoiceWhat does temperature measure?HeatºCKinetic EnergyThermal Energy
- 10. Multiple ChoiceWhat is the SI unit for temperature?KelvinCelciusFahrenheitAll of these
- 11. Multiple ChoiceHow does heat flow?Always from cold to warmAlways from warm to coldBoth warm to cold & cold to warmIt depends on the temperature
- 12. Multiple ChoiceWhen a piece of aluminum foil is taken out of the oven and cools from 100° C to 50°C, What is the change in temperature?50°0°100°150°
- 13. Multiple ChoiceA 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C. Calculate the specific heat capacity of iron.0.46 J/gxoC1.654 J/gxoC2,567,446.875 J/gxoC
- 14. Multiple ChoiceHow many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/gx°C?297 Joules0.003 Joules297 J/gx°C0.003 J/gx°C
- 15. Multiple ChoiceA 0.3 g piece of copper is heated and fashioned into a bracelet. The amount of energy transferred by heat to the copper is 66,300 J. If the specific heat of copper is 390 J/g 0C, what Is the change of the copper's temperature?566.7 °C77,571,000 Joules
- 16. Multiple ChoiceWhen a piece of aluminum foil is taken out of the oven and cools from 100° to 50°, What is the change in temperature?50°0°100°150°
- 17. Multiple ChoiceThe specific heat of aluminum is 0.21 J/g°C. How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?105 J10.5 J1.05 J
- 18. Multiple Choice
How many Joules of energy are required to change 10 gram of liquidwater from 20 C to 90 C?1400 J2800 J210,000 J1,400,000 J - 19. Multiple Choice
20 g of water. specific heat of water is 4.18 J/x°C. temperature changes from 20° C to 25° C, how much heat energy (Q) moves from the water to the surroundings?
418 Joules
209 J
83 J
4.18 J
- 20. Multiple ChoiceIn a laboratory experiment a student was using Styrofoam cups and foil to reduce the energy lost during an exothermic reaction. The reaction constantly had a temperature probe in it. Towards the end of the reaction the student noticed the temperature in the cups was going down (opposite what they thought is should). The student concluded that the energy was destroyed within the system. This student's reasoning violates what law?Law of Conservation of MassLaw of EnthalpyFirst Law of ThermodynamicsLaw of Heat Transfer
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