Home
Class 12
CHEMISTRY
H(2)(g)+1//2O(2)(g)=H(2)O(l) , Delta H(2...

`H_(2)(g)+1//2O_(2)(g)=H_(2)O(l) , Delta H_(298 K)=-68.32` Kcal. Heat of vapourisation of water at 1 atm and `25^(@)C` is 10.52 Kcal. The standard heat of formation (in Kcal) of 1 mole of water vapour at `25^(@)C` is

A

`-78.84`

B

78.84

C

`+57.80`

D

`-57.80`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

H_(2(g)) + 1/2 O_(2(g)) to H_2 O_((l)) , Delta H =- 68 kcal Amount of heat is liberated when 7.2 g of water is decomposed is ______ .

The bond energy of an O-H bond is109 kcal mol^(-1) . When a mole of water is formed

In the combustion of 2.0 g of methane 25 kcal heat is liberated, heat of combustion of methane would be ___________ .

C_(2)H_(6(g)) + n O_(2) rarr CO_(2(g)) + H_(2)O_((l)) In this equation , the ratio of the coefficients of CO_(2) and H_(2)O is

Solve the following examples: How many molecules of water are there in 1 g of wate (H_2 O) ?

In lenticular transpiration, loss of H_2O in the form of water vapour is through ..........

The standard molar heat of formation of ethane, CO_2 "and" H_2 O_((l)) "are respectively" -21.1, -94.1, "and" -68.3 kcal. The standard molar heat of combustion of ethane will be _______ .

For the reaction C_(6)H_(12)(l)+9O_(2)(g)to6H_(2)O(l)+6CO_(2)(g) , DeltaH=-936.9kcal Which of the following is true ?

The heat of formations of CO_((g)) and CO_(2(g)) are -26.4 kcal and -94.0 kcal respectively. The heat of combustion of carbon monoxide will be _________ .

The enthalpies of formation of N_2O and NO at 298 K are 82 and 90 kJ mol^(-1) . The enthalpy of the reaction : 2N_2O_((g)) + 1/2 O_(2(g))rarr 4NO_((g)) is