The molar enthalpy of dissolution of NH NO (s) in water at 25 °C is ΔH = +25.7 kJ mol⁻¹

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

Problem

The molar enthalpy of dissolution of NH

_4

_3

(s) in water at 25 °C is ΔH = +25.7 kJ mol⁻¹. If 2.00 mol of NH

_4

_3

(s) completely dissolve in a calorimeter at constant pressure, what is the value of q for the aqueous system? (a)

+25.7\ \text{kJ}

(b)

+51.4\ \text{kJ}

(c)

-51.4\ \text{kJ}

(d)

+12.9\ \text{kJ}