# Chemistry

posted by Tanner

A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the following figure. When the gas undergoes a particular chemical reaction, it absorbs 827 J of heat from its surroundings and has 0.66 kJ of P−V work done on it by its surroundings. Calculate Delta H and Delta E.

1. DrBob222

delta H = q = 827 J and since it absorbs heat the sign is +.
delta E = q + work
work = PdV = 0.66 kJ
Since work is done ON IT, the sign of work is +.
Substitute and solve.

2. vic

827.66

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