18. Solving a chemistry problem

18. Solving a chemistry problem

6. For the reaction CH4(g) = С(gr) 2H2(g) ΔH0x.р,298 = -74850 J/mol. Heat capacities CpC = 11.19 10.95*10-3T – 4.89*105T-2 ; CpH2 = 27.28 3.26*10-3T 0.502*105T-2; CpCH4 = 17.45 60.46*10-3T 1.12*10-6T2
1) Calculate the coefficients of the series Δcp=f(T);
2) Write the Kirchhoff equation in differential form;
3) Write the Kirchhoff equation in integral form;
4) Integrate the resulting equation;
5) Write down the analytical expression ΔH=f(T);
6) Calculate ∆H300, ∆H320, ∆H340, ∆H360, ∆H380. Plot ΔH=f(T).

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