Heat in Reactions
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A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide.
2 HgO(s) 2 Hg(l) + O2(g)
Hrxn = 181.6 kJ
1. How much heat is needed to decompose 505 g of the oxide?
2. If 270. kJ of heat is absorbed, how many grams of mercury form?
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Stoichiometry Problem
A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide.
2 HgO(s) ----> 2 Hg(l) + O2(g)
deltaHrxn = 181.6 kJ
1. How much heat is needed to decompose 505 g of the oxide?
We determine the molar mass of HgO. By looking up the masses in the Periodic Table, we find that HgO ...
Purchase this Solution
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