Question

OTHERMOCHEMISTRY Calculating the heat of reaction from molar reaction enthalpy and the mass of a reactar A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1+0 (9) AH=182. kJ Use the information to answer the following questions. This reaction is... endothermic. exothermic. Yes, absorbed. Yes, released. No. Tx ? Suppose 64.0 g of HgO react. Will any heat be released or absorbed? If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Round your answer to 3 significant digits. Explanation Check

Answer 1

1) Reaction is endothermic. Because ∆H is positive.

2) Yes, absorbed. Because in endothermic reaction, heat is absorbed.

3) Answer is 26.9 KJ

According to the reaction,

2 moles HgO release 182 KJ heat

2×216.59 HgO release 182 KJ heat

64 g HgO release 182×64/2×216.59 KJ heat

= 26.9 KJ