Thermochemistry Plus

• mass
• specific heat
• change in temperature
• energy

• mass times specific heat
• by using a mole ratio
• final temperature minus initial temperature
• energy into a system minus energy out of a system

Thermochemistry

• the study of heat changes that accompany chemical reactions and phase changes

• the law that states that energy cannot be created or destroyed but can be changed from one form to another

• the amount of heat needed to increase the temperature of an object exactly 1°C

• a process that absorbs heat from the surroundings

Energy can not be created or destroyed, it can only be transferred refers to the....

• law of conservation of energy
• law of conservation of mass
• life facts
• law of conservation of chemistry

A chemical reaction that absorbs heat from the surroundings is said to be __________ and has a __________ ΔH at constant pressure.

• endothermic; positive
• endothermic; negative
• exothermic; negative
• exothermic; positive

Calorimeter

• a chemical process in which a fuel combines rapidly with oxygen to release energy and form products, often carbon dioxide and water

• any chemical or physical change accompanied by the release of heat.

• A device used to measure the quantity of heat energy released in a combustion reaction.

• the quantity of heat energy given off when a specified amount of a substance burns in oxygen.

What term is given to a reaction which transfers heat energy to the surroundings?

• Endothermic

• Reversible

• Exothermic

• Exotermic

Surroundings

• everything in the universe outside of the system

• a part of the universe on which you focus your attention

• The heat absorbed or released by a reaction at constant pressure

• an equation that includes the quantity of energy released or absorbed as heat during the reaction

Heat

• Energy that flows from a hotter to a colder object

• Property of matter that determines the direction of heat flow

• Capacity to do work or supply heat

• the amount of heat necessary to raise the temperature of exactly one gram of water by one degree Celsius.

calorie

• Energy that flows from a hotter to a colder object

• Property of matter that determines the direction of heat flow

• Capacity to do work or supply heat

• the amount of heat necessary to raise the temperature of exactly one gram of water by one degree Celsius.