PRE AP QUIZ 3- THERMOCHEMISTRY

Thermal energy can be measured in the following units: (SELECT ALL 3 THAT APPLY!!)

• grams
• calories
• BTU

• Joules
• degree Celsius

According to the Law of Conservation of Energy,

• Energy can be created or destroyed
• Energy can be created but not destroyed
• Energy cannot be created but can be destroyed
• Energy cannot be created nor destroyed

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How will the heat transfer in this example?

• From the higher temperature of the fire to the lower temperature of the men
• From the lower temperature of the men to the higher temperature of the fire

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Which of the following is correct about heat?(SELECT ALL 3 THAT APPLY!)

• Heat transfers from high temperature to low temperature
• Heat transfers spontaneously (by itself)
• Heat transfers until both substances reach equilibrium
• Heat transfers from low temperature to high temperature
• Heat transfers only when you heat it up

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Gold has a specific heat of 0.129 J/gC. How many joules of heat energy are required to raise the temperature of 15 grams of gold from 22 °C to 85 °C? (Show all your work on your scratch sheet of paper!)

• 42.57 J
• 120 J
• 164.5 J
• 207.045 J

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We did the following calorimetry simulation in class. 20 g of 200 degree celsius copper was combined with 20 degree celsius water in a calorimeter. What does the temperature shown on the digital thermometer represent?

• The temperature of the metal
• The temperature of the cold water
• The temperature of the equilibrium

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Use the following graph from the calorimetry experiment to answer the following question:

• The cold water increased more in temperature than the metal
• The metal and cold water experienced the same amount of change
• The metal decreased more in temperature than the cold water
• The metal increased more in temperature than the cold water

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The molecular diagram of the hot metal and the room temperature water is shown below. What should be shown in the video?

• The particles of the metal will begin to flow
• The particles of the metal and the water will stop having kinetic energy
• The particles of the metal will transfer their kinetic energy to the water
• The particles of the water will transfer their kinetic energy to the metal

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When reading a phase change diagram that shows temperature and energy a flat line with a slope of zero indicates .....

• an increase in temperature
• an increase in pressure
• a phase change
• a liquid

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What would be the correct labels for the locations labeled A and B?

• A-Melting B- Liquid
• A- Gas B- Sublimation
• A-Liquid. B- Gas
• A-Solid. B- melting

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