Recall that work (w) is given by:
• (+): heat, q is gained by the system (i.e. endothermic rxn )
• (–): heat, q is released by the system (i.e. exothermic rxn)
• (+): work is done by the surroundings to the system (compression)
• (–): work is done by the system to the surroundings (expansion)
At constant P → q = ΔH (enthalpy)
Assume that the following reaction occurs at constant pressure: 2 Al(s) + 3 Cl2(g) → 2 AlCl3(s)
(a) If you are given ΔH for the reaction, what additional information do you need to determine ΔE for the process?
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