Consider the following chemical reactions and their standard reaction enthalpies (∆rHo) at 298 K.NH3 + HCl(g) → NH4Cl(s)∆rH0 = -176 kJ/molN2(g) + 3 H2(g) → 2 NH3(g)∆rH0 = -92 kJ/molN2(g) + 4 H2(g) + Cl2(g) → 2 NH4Cl(s)∆rH0 = -629 kJ/molUse this thermochemical data to calculate the standard heat of reaction for the synthesis of hydrogen chloride gas from H2(g) and Cl(g) at a temperature of 298 K. The value of ∆rHo (at 298 K) for the reaction H2(g) + Cl2(g) → 2 HCl(g) is:

MCQs on thermodynamics in classical mechanics systems. Topics include the first, second, and third laws of thermodynamics, energy, work, enthalpy, and entropy, spontaneity, chemical potential, equilibrium, phase changes, and chemical kinetics.