Thermochemistry

The energy transferred between samples of matter because of a difference in their temperatures is called

• temperature.

• thermochemistry.

• chemical kinetics.

• heat.

The enthalpy change for melting a solid, such as ice, is called

• specific heat.

• heat of fusion.

• heat capacity.

• heat of vaporization.

In a balanced endothermic reaction, where does a heat term appear?

• on both sides

• on neither side

• on the left side only

• on the right side only

Which of the following statements about bonds and energy is correct?

• Bond breaking and bond formation both require energy.

• Bond breaking requires energy and bond formation releases energy.

• Bond breaking and bond formation both release energy.

• Bond breaking releases energy and bond formation requires energy.

What principle relates the enthalpy change for a net reaction to the enthalpy changes of a series of summed reactions?

• Henry's law

• Boyle's law

• Hess's law

• Avogadro's hypothesis

Which serves as the unit of heat?

• degree Fahrenheit

• degree Celsius

• kelvin

• joule

The transfer of kinetic energy from a hotter object to a colder object is called

• temperature.

• potential energy.

• caloric.

• heat.

Endothermic reactions are reactions that

• do not involve heat.

• release heat

• take place instantaneously.

• absorb heat.

Which of the following best describes temperature?

• energy of change

• heat energy

• heat absorbed or released in a chemical or physical change

• a measure of the average kinetic energy of the particles in a sample of matter

At constant pressure, the heat absorbed or released during a chemical reaction is equal to

• the temperature change.

• the enthalpy change.

• the heat capacity.

• zero.