Heat Capacity

Q.

What does $\mathrm{C}$ mean in $\mathrm{Q}=\mathrm{MCT}$ ?

Q.

The ratio of heat capacity and specific heat capacity of a body gives its ____________.

Q.

A form of energy which results in the sensation of hotness or coldness is known as __________

1. sound enrgy

2. light energy

3. heat energy

4. chemical energy

Q. $0.5kg$ of water is heated from $20{}^{\circ }C$ to $70{}^{\circ }C$. If the specific heat of water is $4200\frac{J}{kg.K}$, determine the change in internal energy of water.

1. $105kJ$
2. $85kJ$
3. $95kJ$
4. $65kJ$

Q.

Which one has more heat capacity - a mug of water or a bucket of water? Give Reason.

Q. Which of the following has the highest heat capacity?

1. Paraffin
2. Iron
3. Water
4. Mercury

Q. The temperature at which pressure of molecules of a liquid becomes equal to the atmospheric pressure is called its

1. freezing point

2. dew point

3. melting point

4. boiling point

Q. Identify the common in below pictures.

1. 
2. 
3. 
4. 

Q. If a gas expands at constant temperature:

1. the pressure decreases
2. the kinetic energy of the molecules remains the same
3. the $KE$ of the molecules decrease
4. the number of molecules of the gas increase

Q. One calorie is equal to .

1. $\text{4.5 J}$
2. $\text{4.184 J}$
3. $\text{5 J}$

Q. An Aluminum rod of 300 g needs to be heated to a temperature of $60{}^{o}C$. What is the amount of heat required if the initial temperature of the rod is $20{}^{o}C$. [Specific heat of aluminum : $0.21calorie/g^{o}C$]

1. 2250 calories
2. 3250 calories
3. 3000 calories
4. 2520 calories

Q.

A spinning wheel A is brought in contact with another wheel B initially at rest. Because of the friction at contact, the second wheel also starts spinning. Heat energy is dissipated.

1. True

2. False

Q. The temperature at which pressure of molecules of a liquid becomes equal to the atmospheric pressure is called its

1. freezing point

2. dew point

3. melting point

4. boiling point

Q. Deriver $R=\frac{\rho l}{A}$.

Q. A wooden piece piece gets heated easily compared to an iron piece. Consider the mass of both the substances are equal.

1. True
2. False

Q. The heat capacity of a body can be calculated using which relation mentioned below?

1. $\frac{\text{Rise in temperature}}{\text{Amount of heat supplied}}$
2. $\frac{\text{Amount of heat supplied}}{\text{Mass}\times \text{Rise in temperature}}$
3. $\frac{\text{Rise in temperature}}{\text{Mass}\times \text{Amount of heat supplied}}$
4. $\frac{\text{Amount of heat supplied}}{\text{Rise in temperature}}$

Q. Which of the following can be the correct molecular representation of solids?

1. 1 only
2. 2 only
3. 3 only
4. Both 1 and 2