Change of State

Q. A substance changes from its solid state to the liquid state when heat is supplied to it. How does the average kinetic energy of the molecules of the substance change?

Q.

A solid at initial temperature $0{}^{\circ }C$ is heated. A graph showing changes to the heat supplied is given below. What is the mass of solid substance? [Specific heat capacity of solid: $500J/kgK$]

1. $25kg$
2. $0.25kg$
3. $2.5kg$
4. $0.025kg$

Q. In which of the following processes, change in the state of matter involves absorption of energy?
A. Boiling
B. Freezing
C. Condensation
D. Melting

1. A only
2. A and B only
3. A, B and C only
4. A and D only

Q. Melting point of a liquid may increase or decrease with pressure change.

1. True
2. False

Q. The quantity of matter in a body regardless of its volume or of any force acting on it is called its ___ .

Q.

1.Can specific heat capacity of a substance be zero.

2.Can specific heat capacity of a substance be INFINITY

.

Q. All liquids either expands or contracts on boiling.

1. True
2. False

Q. As a physicist, you put heat into a $500g$ solid sample at the rate of $10.0kJ/min$, while recording its temperature as a function of time. You plot your data and obtain the graph shown in figure. What is the latent heat of fusion for this solid in kJ/kg?