Specific Heat

Q.

What is October heat?

Q.

The SI unit of specific heat capacity is

1. J/g K

2. J/kg K

3. J g/ K

4. J kg/K

Q. Suppose the masses of the calorimeter, the water in it and the hot object made up of copper which is put in the calorimeter are the same. The initial temperature of the calorimeter and water is ${30}^{\circ }C$ and that of the hot object is ${60}^{\circ }C$. The specific heats of copper and water are $0.09cal{g}^{-1}{}^{\circ }{C}^{-1}$ and $1cal{g}^{-1}{}^{\circ }{C}^{-1}$ respectively. What will be the final temperature of water?

1. ${21.54}^{\circ }C$
2. ${15.53}^{\circ }C$
3. ${32.29}^{\circ }C$
4. ${46.21}^{\circ }C$

Q. Two substances $A$ and $B$ have specific heats $c$ and $2c$ respectively. If $A$ and $B$ are given $Q$ and $4Q$ amounts of heat respectively, the change in their temperatures is same. If the mass of $A$ is $m$, what is the mass of $B$?

1. $m$
2. $2m$
3. $3m$
4. $4m$

Q.

Three liquids with masses $m_1,m_2,m_3$ are thoroughly mixed. If their specific heats are $c_1,c_2,c_3$ and their temperatures are $T_1,T_2,T_3$ respectively, then the temperature of the mixture is:

1. 
2. 
3. 
4. 

Q.

The heat required to change the state of a substance without any change in temperature is

1. Specific heat capacity

2. Latent heat

3. thermal energy

4. Thermal heat capacity

Q. The amount of heat which is supplied to the body depends on __________.

1. change in the temperature of the body
2. mass of the body
3. material of the body
4. colour of the body

Q.

Difference between heat and Temperature

Q. Which of the following statement is correct when two bodies with different temperature and heat content are connected through a metal wire?

1. The heat will flow from B to A because body B has more temperature
2. The heat will flow from B to A because body B has less heat content
3. There will be no heat exchange between the two bodies
4. The heat will flow from A to B because body A has more heat content

Q.

Heat does not cause expansion.

1. True
2. False

Q.

A beaker contains $200gm$ of water. The heat capacity of the beaker is equal to that of $20gm$ of water. The initial temperature of water in the beaker is ${20}^{\circ }C.$ If $440gm$ of hot water at ${92}^{\circ }C$ is poured into it, the final temperature od the system is

1. 
2. 
3. 
4. 

Q. Certain amount of hot water was added to three times its mass of cold water at ${10}^{\circ }C$. The resulting temperature was found to be ${20}^{\circ }C$. The initial temperature of the hot water is:

1. ${50}^{\circ }C$
2. ${30}^{\circ }C$
3. ${10}^{\circ }C$
4. ${20}^{\circ }C$

Q.

Himanshu wanted to boil water but he had run out of gas. He now has two options - either to use a black colored container or a white colored container to heat water under the sun.

Which of the following is correct?

1. He should use black colored container

2. He should use white colored container

3. Either of the containers will take same amount of time to boil the water

4. Can’t be said

Q.

Two liquids $A$ and $B$ are at temperatures ${32}^{\circ }C$ and ${24}^{\circ }C$ respectively. When mixed in equal masses the temperature of the mixture is found to be ${28}^{\circ }C$. The ratio of their specific heat is:

1. 3 : 2
2. 2 : 3
3. 1 : 1
4. 4 : 3

Q.

The specific latent heat is given as

1. L = Q/m

2. L = m/Q

3. L = Q × m

4. L = Q/m2

Q. A field of maize yields about 0.65 quintals of corn kernels. If a kernel has a mass of $200g$, how many corn kernels are obtained in total?

1. 325

Q.

A liquid of mass $m$ and specific heat $c$ is heated to a temperature $2T$. Another liquid of mass $m/2$ and specific heat $2c$ is heated to a temperature $T$. If these two liquids are mixed, the resulting temperature of the mixture is

1. 
2. 
3. 
4. 

Q. Which of the following conditions is most favourable for converting a gas into liquid?

1. High pressure, low temperature
2. Low pressure, low temperature
3. Low pressure, high temperature
4. High pressure, high temperature

Q.

According to principle of calorimetry

1. heat lost by hot body is equal to heat gained by cold body

2. none of the above

3. heat lost by hot body is less than heat gained by cold body

4. heat lost by hot body is more than heat gained by cold body

Q.

The heat required to raise the temperature of a body by 1 °C is

1. thermal energy

2. thermal/heat capacity

3. specific heat

4. calorie

Q. what is mathematical relation between heat capacity and specific heat capacity

Q.

2000 J of heat is required to melt 40 Kg of substance, then the specific latent heat of substance is

1. 80000 J/kg

2. 800 J/kg

3. 0.02 J/kg

4. 50 J/kg

Q. ____________ vapour does not show deposition.

1. Camphor
2. Moth balls
3. Iodine
4. Water

Q. Two metallic blocks P and Q of masses in ratio $2:1$ are given same amount of heat. If their temperature rise by same amount, what is the ratio of their specific heat capacities?

1. $1:2$
2. $2:1$
3. $1:3$
4. $3:1$

Q.

What is Jkg-1 C-1 ? How can we pronounce it ? How can we measure Specific heat of a material using this unit ? What does 4186 Jkg-1 C-1 mean ?