Thermochemistry

Question 0

Thermochemistry

Answer 0

Study of the quantity of heat absorbed/given off by Chemical reactions

Question 1

Thermodynamics

Answer 1

Science of the relationships between heat and other forms of energy

Question 2

Energy

Answer 2

Potential or capacity to move matter

• units- joules(j)= kg*m2/s2
• Calories(cal)- used by chemists. Equal to amount of energy needed to raise the temperature of 1 gram of water 1 degree Celsius.
• 1 cal= 4.184 joules

Question 3

Kinetic energy(Ek)

Answer 3

Energy of motion

Ek= 1/2 mv2

Question 4

Potential energy(Ep)

Answer 4

Energy an object has based on its position.

Ep= mgh

Question 5

Internal energy(u)

Answer 5

Kinetic energy and potential energies of the particles in a substance

Question 6

Law of conservation of energy

Answer 6

Energy can only be changed, not created or destroyed.

Question 7

Heat (q)

Answer 7

• Energy that flows due to a temperature difference

- Energy will flow until an equilibrium is reached

Question 8

Heat of reaction

Answer 8

The amount of heat needed to return a system to its initial temperature.

Question 9

Endothermic reaction

Answer 9

Absorbs heat

Question 10

Exothermic reaction

Answer 10

Heat is released

Question 11

Enthalpy (H)

Answer 11

Used to obtain Heat gained/lost in a reaction. At a constant pressure, the change in enthalpy will equal the Heat of the reaction.