Chemistry chapter 15

Potential Energy

energy waiting to happen, its store because of how its set up

Kinetic energy

energy of motion

Exothermic

Heat being released in a surrounding , q and change in heat are negative, feels warm

Endothermic

heat being absorbed from the surrounding, q and delta heat are positive and feels cold

Temperature

measure of average kentic energy of particles

Heat (q)

energy transferred due to temperature differences

Scientific Calorie

amount of heat required to raise 1 gram of water by 1 *C

Specific heat ©

the amount of heat required to raise the temperature of 1 gram of a substance by 1 °C.

Calorimetry

study of heat transfer between substances

Thermochemistry

study of heat change during chemical reaction or phase changes

System

specific part of the universe being studied

Surroundings

everything else around the system, exchange heat or energy

delta H (empalthy)

total heat absorbed or released in reaction

Heat flows from what to what

From Hot to cold

Ea activation energy

(activation complex- reactant) minimum energy required to start a chemical reaction

Activation Complex

High energy, Unstable state between reactant and product ( the peak of the graph

What has to be constant in order for q= delta H

pressure must remain constant so the Patm going down and P going up at the same time

1st Law of thermodynamics

energy cannot be created nor destroyed