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Heats of combustion of C2H4, H2 and C2H6...

Heats of combustion of `C_2H_4, H_2 and C_2H_6` are `-1409 K.J, -285 K.J and -1558 KJ`. Heat of hydrogenation of ethylene is 

A

`-136 KJ`

B

`-240 KJ `

C

`136 KJ`

D

` 227 KJ`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • The heats of formation of CO_2, H_2O and C_2H_4 are -94.05, -68.2 and 12.6 K.Cals/ mole, respectively. The heat of combustion of ethylene is

    A
    337 K.Cal
    B
    212.8 K.Cal
    C
    `-372` K.Cal
    D
    `-337` K.Cal

  • The heat of combustion of CH_(4) ,C(graphite) and H_(2)(g) are respectively 20 kcal and -10 kcal. The heat of formation of CH_(4) is

    A
    40kcal
    B
    `+kcal`
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    80 kcal
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    `-70 kcal`

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