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Study the following two reactions: (i)...

Study the following two reactions:
(i) `CH_(4(g))+2 O_(2(g))to CO_(2(g))+2 H_2 O_((g)),
Delta H=-890.4 k J`
(ii) `2 Hg O_((s))to 2 Hg_((l))+O_(2(g)),
Delta H=+181.6 k J`
Which of the following statements is CORRECT?

A

Both reactions are exothermic

B

Both reactions are endothermic

C

Reaction (i) is endothermic and (ii) is exothermic

D

Reaction (i) is exothermic and (ii) is endothermic

Text Solution

Verified by Experts

The correct Answer is:
A
In reaction (i), heat is evolved while in reaction (ii), heat is abosrbed.
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MARVEL PUBLICATION-CHEMICAL THERMODYNAMICS AND ENERGETICS-MULTIPLE CHOICE QUESTIONS (Heat of Reaction)
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  5. 1 mol of H(2) SO(4) in mixed with 2 mol of NaOH. The heat evolved will...

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  6. The heats of neutralisation of four acids a, b, c and d when neutralis...

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  8. A hypothetical reaction, A rarr 2B, proceeds via following sequence of...

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  10. The standard heat of formation of diamond is

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  11. For which one of the following, the standard enthalpy is zero?

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  12. Heat of formation, Delta H(f)^(@) of an explosive compound like NCl(3)...

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  13. Which of the following reactions is defines Delta(f)H^(Theta)?

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  14. The standard heat of formation of ethane, CO(2) and H(2)O((l)) are-21....

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  15. If DeltaH(f)^(@) for H(2)O(2)(l) and H(2)O(l) are -188kJ and mol^(-1) ...

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  16. The heat of formation of Fe(2)O(3(s)) is -824.2 kJ mol^(-1), Delta H f...

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  17. If the heats of formation of C(2)H(2) and C(6)H(6) are 230 kJ mol^(-1)...

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  18. The factors which influence the heat of reaction are

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