Q.

Calculate the change in enthalpy. ΔH, for the combustion of 11.2 L of hydrogen gas, measured at  0C and 1 atm pressure, to form H2O(g):

ΔHfkJmol1
H2O(g)241.8

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a

2710kJ

b

121kJ

c

484kJ

d

60.5kJ

answer is B.

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Detailed Solution

 Mole of H2=11.222.4=0.5

Thus, change in enthalpy.

241.8×0.5=121kJ.

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