A gas absorbs 200J of heat and expands against the external pressure of 1.5 atm from a volume of 0.5 litre to 1.0 litre, Calculate the change in internal energy
124 J
224 J
114 J
154 J
W = – P∆V
= – 1.5 (1– 0.5)
= – 0.75 atm-litre = – 0.75 × 101 Joule
q = 200 J
q = ∆E – W
200 =∆E – (– 0.75 × 101)
∆E = 124.25 Joule
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