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Q.

Mark as true or false:

S. No.StatementT/F
1.For every cyclic process, the final state of the surroundings is the same as the initial state of the surroundings. 
2.For a closed system at rest with no fields present, the sum q+w has the same value for every process that goes from a given state 1 to a given state 2. 
3.H is defined only for a constant-pressure process. 
4.For a constant-volume process in a closed system, ΔH=ΔU 
5.If a closed system at rest in the absence of external fields undergoes an adiabatic process that has w = 0, then the system's temperature must remain constant. 
6.A change of state from state 1 to state 2 produces a greater increase in entropy of the system when carried out irreversibly than when done reversibly. 
7.The system's entropy change for an adiabatic process in a closed system must be zero. 

Find the number of false statements

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answer is 6.

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Detailed Solution

In every statement,

Only 2nd statement is true.

1 Final system state is same.

2 U is a state function.

H is defined for all processes.

4 For a chemical reaction, ΔH=ΔU+VΔP

5 For ideal gases only it is valid.

6 S is a state function.

7 Only for reversible adiabatic process it is zero.

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