ThermoChem Vocab

What is the study of energy changes that take place during a chemical reaction?

Thermodynamics

What law states that energy is neither created nor destroyed in a chemical reaction?

The Law of Conservation of Energy

What is the term for energy stored in chemical bonds?

Chemical potential energy

What is the comparison of the heat of the products compared to the heat of the reactants?

Enthalpy

What term describes the precise measurement of heat flow in a reaction by isolating the environment?

Calorimetry

What is the device used to measure the heat gained or lost in a reaction?

A calorimeter

What kind of reaction releases heat to the environment?

An exothermic reaction

What kind of reaction absorbs heat from the environment?

An endothermic reaction

What is the amount of heat required to raise a substance by $1^{\circ}\text{C}$?

Heat capacity

What is the amount of heat required to raise exactly 1 gram of a substance by $1^{\circ}\text{C}$?

Specific heat

What is the temperature at which a solid changes to a liquid?

Melting point

Ice melts at the molar heat of __________.

Fusion

Ice forms (freezes) at the molar heat of __________.

Solidification

Water boils at the molar heat of __________.

Vaporization

In an exothermic reaction, the energy stored in the chemical bonds of the reactants is __________.

greater than the energy stored in the bonds of the products

The heat capacity of an object depends on what it is made of and its __________.

mass

By what quantity must the heat capacity of an object be divided to obtain the specific heat of that material?

its mass

The amount of heat needed to melt one mole of a solid at melting point is its __________.

molar heat of fusion

What is the heat of solution?

the amount of heat absorbed or released when a solid dissolves