First Law of Thermodynamics

Question 1

Heat capacity

Answer 1

The numerical value of the heat capacity of a body is the quantity of heat required to cause a unit change in temperature

Question 2

Specific Heat Capacity

Answer 2

The numerical value of the specific heat capacity of a substance is the quantity of heat required per unit mass of the substance to cause a unit change in temperature

Question 3

Specific Latent Heat of Fusion

Answer 3

The numerical value of the specific latent heat of fusion is the quantity of heat required to convert unit mass of solid to liquid without any change of temperature

Question 4

Specific Latent Heat of Vaporization

Answer 4

The numerical value of the specific latent heat of vaporisation is the quantity of heat required to convert unit mass of liquid to gas without any change of temperature

Question 5

Internal Energy

Answer 5

The internal energy of a system is determined by the state of the system and it is the sum of the random distribution of kinetic and potential energies associated with the molecules of the system

Question 6

First Law of Thermodynamics

Answer 6

The First Law of Thermodynamics states that the increase in the internal energy of a system is equal to the sum of the heat supplied to the system and the work done on the system, and the internal energy of a system depends only on its state