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16 Cards in this Set

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Thermochemistry

Study of energy changes

Endothermic Reaction

Absorbs energy

Exothermic Reaction

Releases energy

Calorimeter

Measures the amount of heat absorbed

Enthalpy

Heat content of a system @ constant pressure

Joule

SI unit for energy

Calorie

Quantity of heat needed to raise 1g of H2O by 1 degree Celsius

Specific Heat

Quantity of heat needed to change 1g of a substance by 1 degree Celsius

Heat Capacity

Quantity of heat needed to change the temperature of an object by 1 degree Celsius

What are the different forms of energy?

Nuclear, electromagnetic, electrical (light), chemical, mechanical, heat

N.E.E.C.M.H.

How much energy does an energy change account for?

ALL of the energy

What happens when heat is released by a chemical system?

It's absorbed by the surroundings

Temperature differences are caused by...

The transfer of heat; heat transfer

1 Cal =

1 kcal



What does heat capacity have to do with?

Mass & temperature

Q=mc ΔT (measured in Joules)

What happens to the temperature during a phase change?

The temperature remains constant.