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21 Cards in this Set

  • Front
  • Back

Thermodynamics

Study of energy and transformation

Symbol of heat

Q

Unit of heat

Joule and calorie

Define calorie

Amount of heat energy required to raise the temperature by 1 degree for 1 gram of water

Thermal energy is associated with...

Motion of particles

Interaction energy / phase energy is associated with...

The arrangement of particles and state not dependent on the temperature

Chemical potential energy is associated with...

chemical bonds of a substance

The first law of thermodynamics

Energy cannot be destroyed or created

Enthalpy

System and surroundings during a chemical reaction

Endothermic reaction does what?

gains

Exothermic does what

lose

Enthalpy is. with in exothermic

Negative

write all factor which affect the heat absorb/release by the subtance

mass, change in the temperature , and speclific heat

what is specific heat?

amount of heat it takes to raise the temperature of 1 g of the subtance

specific heat depends on……..

mass- and chemical composition

what is heat of fusion?

it is the amount of energy needed to melt of freeze 1 g of a subtance

what is heat of vaporization?

ot os the amount of energy needed to evaporation of 1 g of a substance

what is the value for heat of fusion of water?

334 joule per gram

what is the value for heat of vaporization of water?

2260 joules per gram

what is the heat content?

stored energy of molecule present in the system

calorimetry

it is the precise measurement of the heat flow into a oout of a sysatem for chemical and phycial process