| Question | Answer |
| the ability to do work or produce heat | energy |
| states that energy cannot be created or destroyed | law of conservation of energy |
| energy flowing from a warmer to a cooler object | heat |
| the study of heat changes from chemical reactions and phase changes | thermochemistry |
| energy stored in a substance because of its composition | chemical potential energy |
| heat required to raise the temperature of one gram of a substance by one degree celcius | specific heat |
| an insulated device measuring the heat absorbed or released during a chemical or physical process | calorimeter |
| the system plus surroundings | universe |
| states that spontaneous processes always proceed in such a way that the entropy of the universe increases | second law of thermodynamics |
| everything in the universe other than the system | suroundings |
| the change in enthalpy in a chemical reaction | enthalpy (heat) of reaction |
| a balanced chemical equation that includes the physical states of all reactants and products and the energy change that accompanies the reaction | thermochemical equation |
| a system's heat content at constant pressure | enthalpy |
| energy required to vaporize one mole of a liquid | molar enthalpy (heat) of vaporization |
| energy required to melt one mole of a solid | molar enthalpy (heat) of fusion |
| the enthalpy change for the complete burning of one mole of a substance | enthalpy (heat) of combustion |
| the SI unit of heat and energy | joule |
| how many calories does one joule equal? | 1 joule = .2390 calories |
| how many joules are in 1KJ? | 1000J = 1KJ |
| energy needed to raise the temperature of 1g of pure water to 1 degree celcius | calorie |
| how many calories are in one Calories (kilocalorie)? | 1000 calories = 1 Calorie |
| how many joules are in one calorie? | 1 calorie = 4.184 joules |
| what does each letter represent in the equation q = mcΔT? | m = mass
c = specific heat
triangle = delta |
| enthalpy is negative and energy is a product | exothermic |
| enthalpy is positive and energy is a reactant | endothermic |
| specific part of the universe that contains the reaction of process you wish to study | system |
