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Calculate the amount of energy liberated...

Calculate the amount of energy liberated due to combustion of 4g dihydrogen.

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Amount of energy liberated due to combustion of 1 mol, i.e., 2g dihydrogen = 242 kJ `cdot "mol"^(-1)`
[ `H_(2)(g) + (1)/(2)O_(2)(g) rarr H_(2)O(g), Delta H = -242KJ cdot mol^(-1)` ]
`therefore` Amount of energy liberated due to 4g dihydrogen = 242 `xx 2 = 484 "kK" cdot mol^(-1)`
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