J.R. S. answered • 04/24/23
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2CuS(s) + 3O2(g) ==> 2CuO(s) + 2SO2(g) .. ∆H =-805.6 kJ/mol
Simply convert kJ / mole to kJ / g using the molar mass of CuS
molar mass CuS = 95.61 g / mol
-805.6 kJ / mol x 1 mol / 95.61 g = -8.426 kJ / g
So, 8.426 kJ of heat would be evolved per gram of CuS
J.R. S.
tutor
It would have been if the delta H was given as delta Hrxn but it’s given as per mole.
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04/24/23
Aaron L.
Wouldn't it have been -805.6 kJ / mol x 1mol / 2(95.61 g) = -4.213 kJ / g because there are two mols of CuS?04/24/23