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ashcal ashcal
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4 years ago
How much heat, in kilojoules, is released when nitrogen and hydrogen react to form 50.0 g of ammonia?

N2(g) + 3H2(g) → 2NH3(g)     ΔH = –92.2 kJ

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Mercury(II) oxide decomposes to mercury and oxygen.

2HgO(s) → 2Hg(l) + O2(g)     ΔH = +182 kJ

a.    Is the reaction exothermic or endothermic?
b.    How many kilojoules are needed to react 25.0 g of mercury(II) oxide?
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4 years ago
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