30. Calculate the thermal effect of the reaction 2CH4(g) CO2(g)=CH3COCH3(g) H2O(g) at 500 K, if at 298 K it is equal to 84.92 kJ/mol. The molar heat capacities of gaseous substances are as follows:
СрCH4=17.45 60.46*10-3Т 1.117*10-6Т2 J/(mol*K)
AvCO2=44.14 9.04*10-3T-8.53*105T-2 J/(mol*K)
AvCH3COCH3=22.47 201.8*10-3T-63.5*10-6T2 J/(mol*K)
СрH2O=30.00 10.71*10-3Т 0.33*105Т-2 J/(mol*K)
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