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Change in internal energy when 4 kJ of w...

Change in internal energy when `4 kJ` of work is done on the system and `1 kJ` of heat is given out of the system is

A

`+1kJ`

B

`-5kJ`

C

`+5kJ`

D

`+3kJ`

Text Solution

Verified by Experts

The correct Answer is:
D
From first law of thermodynamics, `DeltaE=q+W`
Here, `W=+4` (`because` work is done on the system)
`q=-1` (`because` heat is given out by the system)
=-1+4=+3 kJ
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-CHEMICAL THERMODYNAMICS AND ENERGETIC-Exercise 1
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  5. Select the correct formula about the change in enthalpy.

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  6. Select the correct formula for Delta(sol)H^(-).

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  7. Which of the following statement is correct regarding melting of ice?

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  8. Which of the following is not an endothermic reaction?

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  10. In the given reaction, Na(s)toNa(g) The enthalpy of atomisation is s...

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  11. In the following process, H(2)(g) to 2H(g), " "Delta(H-H)H^(ө)=43...

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  12. Enthalpy of solution of NaOH (solid) in water is -41.6 kJ mol^(-1). Wh...

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  13. DeltaU^(@) for combustion of methane is -X kJ mol^(-1). The value of D...

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  14. Two moles of an ideal gas is expanded isothermally and reversibly from...

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  15. For the given reaction, CH(4)(g)+2O(2)(g)toCO(2)(g)+2H(2)O(l) Sele...

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  16. What is Deltan(g) for the combusion of 1 mole of benzene, when both re...

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  17. Enthalpy change for the reaction, 4H(g)to2H(2)(g) is -869.5 kJ. Th...

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  18. The heat energy required to ionise the following molecules is given as...

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  19. Given that DeltaH(f)(H)=218kJ//mol, express the H-H bond energy in kca...

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  20. Calculate the difference between DeltaE and DeltaH for the following r...

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