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Which is correct for an endothermic reac...

Which is correct for an endothermic reaction ?

A

`DeltaH` is positive

B

`DeltaH` is negative

C

`DeltaE` is negative

D

`DeltaH` is zero

Text Solution

Verified by Experts

The correct Answer is:
A
For an endothermic reaction, `DeltaH` is positive because in endothermic reaction, heat is always absorbed.
`DeltaH=H_(P)-H_(R)`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-CHEMICAL THERMODYNAMICS AND ENERGETIC-Exercise 1
  1. In which process net work done is zero ?

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  2. Which of the given properties depends on the manner in which a change ...

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  3. Which is correct for an endothermic reaction ?

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  4. If a refrigerator's door is opened then, we get

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  5. Match the columns for the different types of system in thermomdynamics...

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  6. The change in the internal energy for an isolated system at constant v...

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  7. If a gas, at constant temperature and pressure expands, then its

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  8. Select the correct statement(s).

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  9. Which of the following statement/expression is/are correct?

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  10. In a process, 701 J of heat is absorbed by a system and 394 J of work ...

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  11. Which of the following is the correct expression for the change in int...

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  12. The change in internal energy for an isolated system at constannt volu...

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  13. For the equilibrium, A(g)hArrB(g),DeltaH is -40kJ//mol, if the ratio o...

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  14. Based on the first law of thermodynamics, which one of the following s...

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  15. Select the correct statement/expression about the graph.

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  16. If 1 mole of an ideal gas exapands isothermally at 37^(@)C from 15 L t...

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  17. An ideal gas expands from 10^(-3) m^(3) to 10^(-2) m^(3) at 300 K agai...

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  18. For an ideal gas, pressure (p) and interal energy (E ) per unit volume...

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  19. How many joules of heat are absorbed when 70.0 g of water is completel...

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  20. Change in internal energy when 4 kJ of work is done on the system and ...

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