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If S+O(2)toSO(2),DeltaH=-298.2 " kJ" " m...

If `S+O_(2)toSO_(2),DeltaH=-298.2 " kJ" " mole"^(-1)`
`SO_(2)+(1)/(2)O_(2)toSO_(3)DeltaH=-98.7 " kJ" " mole"^(-1)`
`SO_(3)+H_(2)OtoH_(2)SO_(4),DeltaH=-130.2 " kJ" " mole"^(-1)`
`H_(2)+(1)/(2)O_(2)toH_(2)SO_(4),DeltaH=-287.3 " kJ" " mole"^(-1)`
the enthlapy of formation of `H_(2)SO_(4)` at 298 K will be

A

`-754.4kJ`

B

`+320.5kJ`

C

`-650.3kJ`

D

`-433.7kJ`

Text Solution

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The correct Answer is:
A
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Given: (i) S+O_2 to SO_2, Delta H=-298.2 kJ (ii) SO_2 + 1/2 O_2 to SO_3, Delta H=-98.7 kJ (iii) SO_3 + H_2 O to H_2 SO_4, Delta H=-130.2 kJ (iv) H_2 + 1/2 O_2 to H_2 O, Delta H=-287.3 kJ , Then the enthalpy of formation of H_2 SO_4 at 298 K will be _________ .

If {:(SO_(2)+1/2O_(2) rarr SO_(3),DeltaH = -98.7 kJ),(SO_(3)+H_2O rarr H_(2)SO_(4),DeltaH = -130.2 kJ),(H_(2)+1/2O_(2) rarr H_2O , Delta H = -287.3 kJ),(S + H_2 + 2O_(2) rarr H_2SO_4, DeltaH = -814.4 kJ):} Then enthaply of SO_(2) at 298 K is:

Given that (1)/(2)S_(8)(s)+6O_(2)(g)to4SO_(3)(g) , DeltaH^(@)=-1590 kJ The standard enthalpy of formation of SO_(3) is

{:(C+O_(2)(g)rarrCO_(2)" ......(i),",DeltaH=-"393 k J mol"^(-1)),(H_(2)+1//2O_(2)rarr H_(2)O", .....(ii)",DeltaH=-"287.3 k J mole"^(-1)),(2CO_(2)+2H_(2)O rarr C_(2)H_(5)OH+2O_(2)" .....(iii)",DeltaH="1366.8 kJ mol"^(-1)):} Find the standard enthalpy of formation of C_(2)H_(5)OH(l)

If, S+O_2 rarr SO_2, Delta H =-298.2 kj SO_2 + 1/2 O_2 rarr SO_3, Delta H=-98.7 kJ SO_3 + H_2 O rarrr H_2SO_4 , Delta H =-130.2 kJ H_2 + 1/2 O_2 rarr H_2 O, Delta H =-227.3 kJ Find Delta H for formation of H_2SO_4 at 298 K.

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