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Assertion : There is no change in intern...

Assertion : There is no change in internal energ in a cyclic process.
Reason : Internal energy is a state function.

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Assertion (A): Internal energy change in a cyclic process is zero. Reason (R ) : Internal energy is a state funciton.

The change in the internal energy of a substance

Change in internal energy in an isothermal process for ideal gas is

In an isochoric process the increase in internal energy is

Assertion :- Change in internal energy is zero for all gases at constant temperature. Reason :- Internal energy is function of temperature only.

Assertion: Under adiabatic free expansion, ((dU)/(dV))_(T) is +ve when attractive forces are dominant between gas molecules [U,V,T respresent internal energy, volume and temperature of gas respectively] Reason: Internal energy is a state function.

What will be nature of change in internal energy in case of processes shown below ?

What is the change in internal energy of a system undergoing a cyclic process, at the end of a cycle ?

Assertion :- Internal energy of a real gas may change during expansion at const. temperature. Reason :- Internal energy of a real gas ia function of T & P .

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ICSE-CHEMICAL THERMODYNAMICS -VERY SHORT ANSWER TYPE QUESTIONS
  1. What is the sign convention for work?

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  2. A gas expands by a volume DeltaV against a constant pressure P. What i...

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  3. Assertion : There is no change in internal energ in a cyclic process. ...

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  4. Write the mathematical statement of first law of thermodynamics.

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  5. What happens to the internal energy of a system if work is done on the...

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  6. What happens to the internal energy of a system if work is done by the...

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  7. For the reaction, N2(g) + 3H2(g) to 2NH3(g) , predict whether the wor...

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  8. Define internal energy of a system.

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  9. What is the value of DeltaE when the work done by the system is equal ...

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  10. Define internal energy and enthalpy of a system.

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  11. Derive the following equation : Delta H = DeltaU + (Deltan) RT

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  12. What is the value for DeltaH for the given process, NaOH(aq) + HCl ...

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  13. What do you understand by a spontaneous process ? Give two examples

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  14. Which of the following processes are spontaneous and which are non-spo...

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  15. In which direction does a spontaneous process proceed ?

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  16. Dissolution of ammonium chloride in water is an endothermic reaction, ...

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  17. Explain the term 'entropy'.

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  18. If a system absorbs q amount of heat at temperature T, what would be t...

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  19. Define the term absolute entropy.

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  20. Is the entropy of the universe constant ?

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