1) Because ΔH is positive, the reaction is endothermic.
2) Yes, absorbed, because in endothermic reaction heat is absorbed.
3) Heat will be released 26.9 KJ
Enthalpy depends only on the system's composition, temperature, and pressure; it is unaffected by the system's history. It is a quality or state function that resembles energy and has energy-like properties (and is thus measured in units of joules or ergs).
Given reaction is
2HgO(s) → 2Hg(l) + O₂(g) ΔH = 182KJ
1) Because ΔH is positive, the reaction is endothermic.
2) Yes, because heat is absorbed during endothermic reactions.
3) Heat will be released 26.9 KJ
According to the reaction,
2 moles HgO of release = 182 KJ heat
2×216.59 HgO release = 182 KJ heat
64 g HgO release = 182×64/2×216.59 KJ heat
64 g HgO release = 26.9 KJ.
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