ThermochemistryMedium

Question

If DfHo (C2H4) and ᐃfHo (C2H6) are x1 and x2 kcal mol-1, then heat of hydrogenation of C2H4 is :

Options

A.x1 + x2
B.x1 - x2
C.x2 - x1
D.x1 + 2x2

Solution

C2H4(g)  + H2 (g) → C2H6 (g)
ᐃHo = ᐃHfo (C2H6, g) - ᐃHfo (C2H4, g)  = x2 - x1

Create a free account to view solution

View Solution Free
Topic: Thermochemistry·Practice all Thermochemistry questions

More Thermochemistry Questions

Calculate the enthalpy of formation (in kcal/mol) of anhydrous Al2Cl6 from the following data.2Al(s) + 6HCl(aq) → Al2Cl6...From the following data at 25o C, which of the following statement(s) is/are correct?½H2(g) + ½O2(g)→ OH(g): ΔHo = 42 kJ...One gram sample of NH4NO3 is decomposed in a bomb calorimer, the temperature of the calorimeter increase by 6.12 K. The ...The standard heat of combustion of propane is −2220.1 kJ/mol. The standard heat of vaporization of liquid water is 44 kJ...The enthalpy of formation of ammonia gas is −46.0 kJ/mol. The enthalpy change for the reaction2NH3(g) → N2(g) + 3H2(g) i...