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If, combustion of 4g of CH(4) liberates ...

If, combustion of `4g` of `CH_(4)` liberates `2.5kcal` of heat, the heat of combustion of `CH_(4)` is `:`

A

`-20` kcal

B

`-10` kcal

C

`2.5` kcal

D

`-5`kcal

Text Solution

Verified by Experts

The correct Answer is:
B
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FIITJEE-THERMODYNAMICS AND THERMOCHEMISTRY -ASSIGNMENT PROBLEMS (OBJECTIVE) LEVEL-I
  1. Given at A(s) to A(l), DeltaH =x A(l) to A(g), DeltaH =y The hea...

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

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

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

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

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

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

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

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

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

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

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

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

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

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  15. Heat of combustion of CH(4),C(2)H(4),C(2)H(6) are -890,-1411 and -1560...

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  16. Heat of neutralisation of a strong acid by a strong base is equal to D...

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  17. In which case of mixing of a strong acid and a base each of 1N concent...

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  18. The enthalpy of neutralisation of HCl by NaOH IS -55.9 kJ and that of...

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  19. 10 mol of a gas is heated at constant pressure to raise its temperatur...

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  20. An exothermic reaction is one which

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