1) When a liquid is transformed into its vapor at constant temperature,
(a) The enthalpy of the vapor is less than the enthalpy of the liquid.
(b) Energy is released to the surroundings.
(c) The process is exothermic.
(d) The potential energy of the molecules increases.
2) When a solid is transformed into its vapor at constant temperature,
(a) The enthalpy of the vapor is greater than the enthalpy of the solid.
(b) The kinetic energy of the molecules decreases.
(c) The standard molar enthalpy of formation of the vapor is less than the standard molar enthalpy of formation of the solid.
(d) The process is exothermic.
3) When a liquid is transformed into its solid at constant temperature,
(a) The process is exothermic.
(b) The enthalpy of the solid is greater than the enthalpy of the liquid.
(c) The kinetic energy of the molecules increases.
(d) Energy is absorbed by the system.
4) When a vapor is transformed into its liquid at constant temperature,
(a) The enthalpy of formation of the liquid is greater than the enthalpy of formation of the vapor.
(b) The process is endothermic.
(c) Heat is released to the surroundings.
(d) The kinetic energy of the molecules increases.
5) When a solid is transformed into its liquid at constant temperature,
(a) The enthalpy of the solid is less than the enthalpy of the liquid.
(b) Energy is released to the surroundings.
(c) The process is exothermic.
(d) The kinetic energy of the molecules decreases.
6) When a vapor is transformed into its solid at constant temperature,
(a) The enthalpy of the solid is more than the enthalpy of the vapor.
(b) The kinetic energy of the molecules decreases.
(c) The process is endothermic.
(d) Energy is absorbed by the system.