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Which are of the following is an exother...

Which are of the following is an exothermic reaction?

A

`N_(2(g)) + O_(2(g)) + 180.8k.J rarr 2NO_((g))`

B

`N_(2(g)) + 3H_(2(g)) - 92k. J rarr 2NH_(3(g))`

C

`C_(("graphite")) + H_(2)O_((g)) rarr CO_((g)) + H_(2(g)) - 131.3kJ`

D

`C_(("graphite")) + 2S_((s)) rarr CS_(2(l)) - 91.9 kJ`

Text Solution

Verified by Experts

The correct Answer is:
B
`R + Delta H rarr P, Delta H lt 0 rArr` exothermic
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AAKASH SERIES-CHEMICAL THERMODYNAMICS-PRACTICE SHEET (EXERCISE- II) (LEVEL- I (MAIN) STRAIGHT OBJECTIVE TYPE QUESTIONS)
  1. Which of the indicated relationship is correct for the following exoth...

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  2. For which of the following elements, the standard enthalpy is not zero...

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  3. Which are of the following is an exothermic reaction?

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  4. (A) : The reaction C + O(2) rarr CO(2) is an exothermic reaction Rea...

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  5. For the transition C(("diamonid")) rarr C(("graphite")) , Delta H = -1...

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  6. Which of the following equation represents standard heat of formation ...

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  7. Which of the following is not a combustion reaction

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  8. The chemical process involved in the combustion reactions is

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  9. MgSO(4(s)) + H(2)O rarr MgSO(4(aq)), Delta H = - 84K. Cals, Delta H of...

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  10. The heat change for the following reaction C((s)) + 2S((s)) rarr CS(2(...

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  11. N(2) + 3H(2) rarr 2NH(3), Delta H = - 46K. Cals. From the above reacti...

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  12. The enthalpies of HCl, NaOH ,NaCl and H(2)O are -120, -82, -148 and -6...

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  13. How much energy is released when 6 mole of octane is burnt in air? Giv...

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  14. What is theheat of formation of C(6)H(6), given that the heats of comb...

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  15. Heat of combustion of C(2)H(4) is -337 kCal. If 5.6 lit O(2) is used a...

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  16. For the following reaction H((aq))^(+) + OH((aq))^(-) rarr H(2)O((l)) ...

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  17. For the reaction 2H(2)O((l)) rarr H(3)O((aq))^(+) + OH((aq))^(-), the ...

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  18. The heat of neutralisation is maximum when

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  19. Assertion (A): Heat of neutralization of HClO(4) with NaOH is same as ...

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  20. In which of the following combinatins of HCL and NaOH, the heat energy...

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