← Chapter 16 Test
5 Written Questions
5 Matching Questions
- chemical potential energy
- free energy
- a The energy that is available to do work - the difference between the change in enthalpy and the product of the entropy change and the absolute temperature.
- b The SI unit of heat and energy.
- c An insulated device that is used to measure the amount of heat released or absorbed during a physical or chemical process.
- d The energy stored in a substance because of its composition; is released or absorbed as heat during chemical reactions or processes.
- e A measure of the disorder or randomness of the particles of a system.
5 Multiple Choice Questions
- The change in enthalpy for a reaction - the difference between the enthalpy of the substances that exist at the end of the reaction and the enthalpy of the substances present at the start.
- A balanced chemical equation that includes the physical states of all the reactants and products and specifies the change in enthalpy.
- A physical or chemical change that occurs without outside intervention and may require energy to be supplied to begin the process.
- A form of energy that flows from a warmer object to a cooler object.
- The amount of heat required to raise the temperature of one gram of a given substance by one degree Celsius.
5 True/False Questions
molar enthalpy of vaporization → The amount of heat required to melt one mole of a solid substance.
calorie → An insulated device that is used to measure the amount of heat released or absorbed during a physical or chemical process.
enthalpy of combustion → The enthalpy change for the complete burning of one mole of a given substance.
molar enthalpy of fusion → The amount of heat required to evaporate one mole of a liquid.
surroundings → In thermochemistry, includes everything in the universe except the system.