28. Calculate the standard heat of formation of the compound (Table 4), if its heat of combustion is known (see Table 1 of the Appendix) at T = 298 and p = 1.0133 * 105 Pa. Combustion products CO2(g) H2O(l) N2(g).
28 CH4(g) methane

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.