Thermochem practice

When heat flows from system to the surroundings that is an example of an ________________ process.

• exothermic

• endothermic

What device is used to measure the amount of heat involved in a chemical reaction or physical process?

• barometer

• calorimeter

• thermometer

What is calorimetry?

• process of measuring kinetic and potential energy

• process of measuring heat flow of chemical reactions

• process of measuring pressure and temperature of a substance

What does temperature measure?

• Heat
• ºC
• Kinetic Energy
• Thermal Energy

What type of reaction is shown in the picture?

• endothermic
• exothermic

If two objects have different temperatures, 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

The potential energy diagram of a reaction is shown. Which statement below is correct relating to this reaction?

• #1 represents the enthalpy change for this exothermic reaction.

• #2 represents the enthalpy change for this endothermic reaction.

• #3 represents the enthalpy change for this endothermic reaction.

• #4 represents the enthalpy change for this exothermic reaction.

The amount of heat energy required to change the temperature of 12 g of gold from 45°C to 15°C is -47 J. What is the specific heat capacity of gold?

• 0.13 J/(g°C)

• 17,000 J/(g°C)

• 1600 J/(g°C)

• 0.065 J/(g°C)

What is the study of heat changes that accompany chemical reactions and phase changes?

• energy

• chemistry

• work

• thermochemistry

The heat required to raise the temperature of 1g of a substance by 1∘C

• calorie
• joule
• specific heat
• 4.184 J