Methanol, CH3OH, is a possible fuel for automobiles. Energy is evolved in its combustion with oxygen, O2: kJ 2 mol CH3OH(g) %3D 2 CH3OH(g) + 3 O2(g) → 2 CO2(g) + 4 H2O1) AH° rxn A 0.0466-g sample of methanol evolves 1110 J of heat when burned with oxygen at constant pressure. a) What is the enthalpy change (AH xn) for this reaction (kJ/ 2 mol CH3OH(9) )? AH° rxn [ Select ] kJ/ 2 mol CH3OH(g)

The common fertilizer NH,N0;(s), can explosively decompose according to the following reaction. What is the heat released when 80.06 g of NH,NO;(s) explodes? Molar mass of NH,NO:(s)= 80.06 g/mol. 28. 2 NH,NO3(s) → 2 N2(g) + O2(g)+4 H,O (g) AH = -236.15 kJ -472.3 kJ A) B) -236.15 kJ -118.08 kJ D) -59.04 kJ

Consider the following reaction. CH3OH(g)  CO(g) + 2 H2(g)    H = +90.7 kJ ((b) Calculate the amount of heat transferred when 40.0 g of CH3OH(g) are decomposed by this reaction at constant pressure.H =  kJ(c) If the enthalpy change is 20.0 kJ, how many grams of hydrogen gas are produced? g(d) How many kilojoules of heat are released when 12.5 g of CO(g) reacts completely with H2(g) to form CH3OH(g) at constant pressure?H =   kJ(e) Calculate E when 880.0 g of CH3OH(g) completely reacts at a constant temperature of 300 K and constant pressure of 0.95 atm. R = 8.314 J/mol*K and R = 0.08206 atm*L/mol*K   kJ HopHelpCh5N1

Given: 4AICI3(s) + 302(g) → 2Al,O3(s) + 6C12(g); AH=-529.0 kJ determine AH for the following thermochemical equation. Cl,(3) + Al,O;(s) → AICI,(9) + 02(g) O +88.2 kJ O +264.5 kJ O +176.3 kJ O -176.3 kJ O +529.0 kJ