Tasha P.

asked • 07/22/19

Enthalpy Change Given 3 Reactions & Their Enthalpy Changes

Use the enthalpy changes given in the data below to calculate the enthalpy change for this reaction:

Ca(OH)2(s) → CaO(s) + H2O(g)

Data:

Reaction no. Reaction ΔrH° / kJ mol-1 at 298K, standard state = 1 bar.
1 Ca(s)+ 1/2 O2(g) → CaO(s) -635
2 Ca(OH)2(s) → Ca(s) + O2(g) + H2(g) +986
3 H2O(g) → H2(g) + 1/2 O2(g) +242


1 Expert Answer

By:

Tasha P.

@J.R. S. Thank you! Quickly checked up Hess' law and understood in a heartbeat.
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07/22/19

J.R. S.

tutor
Good. Glad I could help.
Report

07/22/19

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