A reaction carried out at constant pressure releases 4.75 kJ of heat when 0.125 mol…

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

A reaction carried out at constant pressure releases 4.75 kJ of heat when 0.125 mol of NH₃(g) is produced. What is the molar enthalpy change, ΔH, for the formation of NH₃(g) under these conditions? (a) +38.0 kJ mol−1+38.0\ \text{kJ mol}^{-1} (b) −0.594 kJ mol−1-0.594\ \text{kJ mol}^{-1} (c) −38.0 kJ mol−1-38.0\ \text{kJ mol}^{-1} (d) −4.75 kJ mol−1-4.75\ \text{kJ mol}^{-1}

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