Please answer question 9 to 13. Thank you.

g 9. When 20 g of a fuel is burnt, the heat released raises the temperature of 200 g of water by 5 C, what is the enthalpy of combustion of the fuel in kJ/g? (cwater = 4.184 Jg'K-) 10. Calculate the enthalpy of solution of sodium hydroxide if 5 g produces a temperature increase of 12.5 C in a 100 cm sample of water. (cwater = 4.184 /JgC; lwater = 1.00 g/cm') 11. Find the AH for the reaction below, given the following reactions and subsequent AH values: PC15(g) - PC13(g) + Cl2(g) 1) P4(s) + 6Cl2(g) 4PC13(g) AH = -2439 kJ 2) 4PCls(g) P4(s) + 10C1 2(g) AH = 3438 kJ 12. Find the AH for the reaction below, given the following data 2CO2(g) + H2O(g) C2H2(g) + 5/202(g) - - 1).....C2H2(g) + 2H2(g) C2H6(g) AH =-94.5 kJ 2).....H2O(g) H2(g) + 1/2O2(g) AH =71.2 kJ 3)......C2H6(g) + 7/202(g) 2CO2(g) + 3H2O(g) AH =-283 kJ 13. Write an expression for the AH of the reaction below, given the following data: N2H4(1) + H2(g) 2NH3(g) AH = x kJ Data N2H4(1) + CH40(1) - CH2O(g) + N2(g) + 3H2(g) AH = a kJ N2(g) + 3H2(g) 2NH 3(g) AH = b kJ CH4O(1) CH2O(g) + H 2() AH = C - kJ