8. Calculate the heat of reaction CH4(g) 2H2O(g)=CO2(g) 4H2(g)
at 500 C, if under standard conditions it is equal to 165.0 kJ, and the values ​​of molar heat capacities are as follows:
СрCH4=17.45 60.46*10-3T 1.12*10-6T2 J/(mol*K)
СрH2O=30.00 10.71*10-3T 0.33*105T-2 J/(mol*K)
СрCO2=44.14 9.04*10-3T -8.53*10-5T2 J/(mol*K)
СрH2=27.28 3.26*10-3T 0.502*105T-2 J/(mol*K)

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