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The combustion of 1.22 g benzoic acid (M...

The combustion of 1.22 g benzoic acid (M=122) in a bomb calorimeter at 300 K caused a temperature rise of 3 K, While combustion of 0.88 g ethyl ethanote (M=88) caused a temperature rise of 2 K. Calculate the enthalapy change of combustion of `CH_(3)COOC_(2)H_(5)(l)` at 300 K. Given : Internal energy change of combustion for benzoic acid =-300kJ`mol^(-1)` at 300 K and R=8.3` JK^(-1)mol^(-1)`

A

`-2000 kJ//mol`

B

`-2002.49 kJ//mol`

C

`-2006.5 kJ//mol`

D

`-3002.5 kJ//mol`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • Calculate the work done during combustion of 0.138 kg of ethanol, C_(2)H_(5)OH(l) at 300 K. Given : R=8.314 JK^(-1)mol^(-1) , molar mass of ethanol =46g mol^(-1)

    A
    `-7482J`
    B
    `7482J`
    C
    `-2494J`
    D
    `2494J`

  • Calculate the work done during combustion of 0.138 kg of ethanol, C_(2)H_(5)OH_(1) at 300 K. Given: R= 8.314 JK^(-1) mol^(-1) molar mass of ethanol = 46 gm mol^(-1)

    A
    `-7482` J
    B
    7482 J
    C
    `-2494` J
    D
    2494 J

  • The heat of combustion of methane gas is -212" kcal mol"^(-1) Calculate Delta U" at "300 K," if "R=2" cal "K^(-1)mol^(-1) .

    A
    `-212" kcal mol"^(-1)`
    B
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