Chemstry II - Unit 8: Thermochemistry (Vocabulary)

calorie

Amount of energy needed to raise temperature 1 gram of water 1 degree C

Calorie

Amount of energy needed to raise temperature 1 kilogram of water 1 degree C

calorimeter

a measuring instrument that determines quantities of heat

calorimetry

The precise measurement of heat flow out of a system for chemical and physical processes

endothermic

(of a chemical reaction or compound) occurring or formed with absorption of heat

energy

the ability to do work or cause change

enthlapy

energy gained or released in a process

exothermic

Chemical Reaction in which energy is primarily given off in the form of heat

heat

The energy transferred between objects that are at different temperatures

Hess's Law

the overall enthalpy change in a reaction is equal to the sum of enthalpy changes for the individual steps in the process

joule

SI unit of energy

molar heat capacity

the energy required to raise the temperature of one mole of a substance by one degree Celsius

molar heat of fusion

the amount of heat absorbed by one mole of a solid substance as it melts to a liquid at a constant temperature

molar heat of solution

the enthalpy change caused by the dissolution of one mole of a substance

molar heat of vaporization

the amount of heat absorbed by one mole of a liquid as it vaporizes at a constant temperature

specific heat capacity

the energy required to raise the temperature of one gram of a substance by one degree Celsius

standard heat of formation

the change in enthalpy that accompanies the formation of one mole of a compound from its elements with all substances in their standard states at 25 degrees celsius

thermochemical equation

a chemical equation that includes the enthalpy change

thermochemistry

the study of energy changes that occur during chemical reactions and changes in state