Thermal Physics

Question 1

Internal Energy

Answer 1

The sum of the randomly distributed kinetic and potential energies of the particles in a body

Question 2

First Law of Thermodynamics

Answer 2

The internal energy of a system is increased when energy is transferred to it by heating or when work is done on it

Question 3

Specific Heat Capacity

Answer 3

The amount of thermal energy required to raise the temperature of 1 Kg of a substance by 1 K without a change of state

Question 4

Latent Heat

Answer 4

The thermal energy required to change the state of 1 Kg of mass of a substance without changing temperature

Question 5

Latent Heat of Fusion

Answer 5

The thermal energy required to convert 1 Kg of solid to liquid without change of temperature

Question 6

Latent Heat of Vaporisation

Answer 6

The thermal energy required to convert 1 Kg of liquid to gas with no change in temperature

Question 7

Avogadro’s constant

Answer 7

the number of atoms of carbon-12 in 12g of carbon-12 is equal to 6.02 x 10^23 mol^-1