Zeroth Law of Thermodynamics

Q. 53. During a process a system absorbs 710 J of heat and does work? The change in internal energy for the process is 460 J. What is the work done by the system?

Q. Give the SI unit of thermal conductivity and write its full form .

Q. what is 1. thermal equilibrium 2. internal energy 3. isothermal process 4.adiabatic process 5. isochoric process 6. isobaric process 7. cyclic process 8. calvien plank law 9.claousius law 10. reversible process 11. irreversible process 12. heat engine 13.carnots engine 14. refrigerator 15. thermodynamics

Q.

state second law of thermodynamics

Q.

State the first law of thermodynamics for isochoric process.

1. dU + dW = 0

2. dQ = dU + P (V_f - V_i)

3. dQ = dW

4. dQ = dU

Q.

Suppose two systems X and Y are separated by adiabatic wall and both are in contact with another system Z separated by a conducting wall as shown in the figure below. Let the temperatures of the three systems be T_x, T_y and T_z . It is given that T_x= T_z and T_y = T_z then what would be the relation between T_x and T_y?

1. T_x > T_y

2. T_x<T_y

3. T_x=T_y

4. T_x <T_z<T_y

Q.

ste the first law of thermodynamics

Q.

apply first law of thermodynamics to adiabatic process.

Q. Three substances are added to a mug to make coffee: coffee at ${65}^{\circ }\text{C}$, milk at ${65}^{\circ }\text{C}$ and sugar. If the sugar is in thermal equilibrium with the coffee, then which of the following is/are true?

1. Heat will be transferred from sugar to milk to reach thermal equilibrium.
2. The sugar is in themal equilibrium with the milk.
3. Heat will be transferred from the coffee to the sugar to reach thermal equilibrium.
4. None of these conclusions are valid.

Q. name the thermodynamics variables defined by i) zero the law ii) first law of thermodynamics

Q.

A system X is neither in thermal equilibrium with Y, nor with Z. The systems Y and Z -

1. Must be in thermal equilibrium

2. None of these

3. Cannot be in thermal equilibrium

4. May be in thermal equilibrium

Q. The value of critical temperature in terms of Vander Walls constants a&b is given

Q. Two bodies A, B and bodies B, C are in thermal equilibrium with each other. The temperature of A is ${45}^{\circ }\text{C}$. Then the temperature of C is

1. ${45}^{\circ }\text{C}$
2. $<{45}^{\circ }\text{C}$
3. $>{45}^{\circ }\text{C}$
4. can be any temperature

Q. A system X is neither in thermal equilibrium with Y, nor with Z. The systems Y and Z thermal equilibrium.

1. must be in
2. must not be in
3. may be in