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The standard enthyalpy of N(2(g))+3H(2(g...

The standard enthyalpy of `N_(2(g))+3H_(2(g)rarr2NH_(3(g)) ` is

A

`-46.2 kJ`

B

`+46.2 kJ`

C

`-92.4 kJ`

D

`+92. kJ`

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Calculate the value of log K_(p) for the reaction, N_(2(g))+3H_(2(g))hArr2NH_(3(g)) at 25^(@)C . The standard enthalpy of formation of NH_(3(g)) is -46kJ and standard entropies of N_(2(g)) , H_(2(g)) and NH_(3(g)) are 191 , 130 , 192 JK^(-1) mol^(-1) . respectively. ( R=8.3JK^(-1)mol^(-1) )

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The enthalpy change (Delta H) for the reaction N_(2) (g)+3H_(2)(g) rarr 2NH_(3)(g) is -92.38 kJ at 298 K . What is Delta U at 298 K ?

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