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When solid NH(4)NO(3) is dissolved in wa...

When solid `NH_(4)NO_(3)` is dissolved in water at `25^(@)C`, the temperature of the solution decreases. What is true about the signs of `DeltaH and DeltaS` for this process?

A

`{:(DeltaH,DeltaS),(-,+):}`

B

`{:(DeltaH,DeltaS),(-,-):}`

C

`{:(DeltaH,DeltaS),(+,+):}`

D

`{:(DeltaH,DeltaS),(+,-):}`

Text Solution

Verified by Experts

The correct Answer is:
C
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FIITJEE-THERMODYNAMICS AND THERMOCHEMISTRY -ASSIGNMENT PROBLEMS (OBJECTIVE) LEVEL-I
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  2. Which of the following processes is an isoentropic process?

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  3. When solid NH(4)NO(3) is dissolved in water at 25^(@)C, the temperatur...

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  4. Which of the following expression represent the work done in reversibl...

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  5. The heats of neutralisation of four acidsA,B,C and D are -13.7,-9.4,-1...

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  6. Which fuel provides the highest calorific value?

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  7. Given at A(s) to A(l), DeltaH =x A(l) to A(g), DeltaH =y The hea...

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  8. A person requires 2870 kcal of energy to lead normal daily life. If he...

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  9. If, combustion of 4g of CH(4) liberates 2.5kcal of heat, the heat of c...

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  10. AB,A(2) and B(2) are diatomic molecules. If the bond enthalpies of A(2...

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  11. DeltaC(p) for the change, N(2)(g) + 3H(2)(g) = 2NH(3)(g) is

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  12. The heats of oxidation of Mg and Fe are given (a) Mg + 1/2O(2) to Mg...

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  13. H^(+)(aq) + NaOH(aq) = Na^(+) + H(2)O(l) ,DeltaH(1) -13690 cal HCN(a...

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  14. Isothermally at 27^(@) C, 1 mole of van der Waals gas expands reversib...

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  15. Equal volumes of C(2)H(2) and H(2) are combusted under identical condi...

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  16. Heat of neutralisation of a strong dibasic acid in dilute solution by ...

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  17. The temperature of a 5mL of strong acid increases by 5^(@) when 5 mL o...

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  18. DeltaH(t)^(@) for CO(2)(g) and H(2)O(g) are -393.5, -110.5 and -241.8 ...

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  19. Given N(2)(g)+3H(2)(g)=2NH(3)(g),DeltaH^(@)=-22 kcal. The standard e...

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  20. The amount of energy released when 20 ml of 0.5 M NaOH are mixed with ...

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