For a particular reaction carried out at constant volume

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

Problem

For a particular reaction carried out at constant volume, the system releases 45 kJ of heat to the surroundings while 12 kJ of work is done on the system by the surroundings. What is the value of ΔEsys\Delta E_{\text{sys}} for the reaction? (a) −57 kJ-57\,\text{kJ} (b) −45 kJ-45\,\text{kJ} (c) −33 kJ-33\,\text{kJ} (d) +33 kJ+33\,\text{kJ}

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