Question
Consider the reaction 2H2O(g) →2H2(g) + O2(g) ΔH = +483.60 kJ/mol at a certain temperature. If...
| Consider the reaction 2H2O(g) →2H2(g) + O2(g) ΔH = +483.60 kJ/mol at a certain temperature. If the increase in volume is 27.7 L against an external pressure of 1.00 atm, calculateΔU for this reaction. (The conversion factor is 1 L· atm = 101.3 J.) _______kJ |
Answers
Change in the volume, AV -27.7L External pressure againt vaccum, Pot = 1 00 am Work done, WPaV =1.00 atm x 27.7 L fn 1 kJ 103 J According to 1えlaw of thermodynamics, change in internal energy is the sum of the heat transferred and the work done 2806 JdH = 2.806 kJ Change in enthalpy,AU ,AH-Par -483.60 kJ-2.806 kJ = 480.794 kJ
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