1st law of thermodynamics

Question 1

Specific Heat Capacity definition

1st law of thermodynamics

Answer 1

thermal energy transferred per unit mass per unit change in temperature

Question 2

Specific Latent Heat definition

1st law of thermodynamics

Answer 2

the thermal energy required to change the matter state of 1kg of the substance without changing its
temperature

Question 3

Types of Specific Latent Heat

1st law of thermodynamics

Answer 3

• specific latent heat of fusion
• specific latent heat of vaporisation

Question 4

Specific Latent Heat of Fusion

1st law of thermodynamics

Answer 4

thermal energy required to change 1kg of substance between solid & liquid at constant temperature

Question 5

Specific Latent Heat of Vaporisation

1st law of thermodynamics

Answer 5

thermal energy required to change 1kg of substance between liquid & gas at constant temperature

Question 6

Internal Energy of a system

1st law of thermodynamics

Answer 6

sum of the random distribution of kinetic energy due to the motion of molecules & potential energies associated with vibrational motion and electric energy of atoms within the molecules of the system

Question 7

First Law of Thermodynamics

1st law of thermodynamics

Answer 7

increase in internal energy of the system = the sum of the heat supplied to the system & the work done on the system