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10g of argon is compressed isothermally and reversibly at a temperature of 27^(@)C from 10 L to 51. Calculate q, w, Delta U and Delta H.

Answer»

Solution :`Q = -2.303 nRT log V_(2)//V_(1) = -2.303 xx 10//40 MOL xx 2 "cal" K^(-1) mol^(-1) xx 300K xx log 5//10 = - 103.635` Cal
For isothermal compression `Delta U = 0`
`W = Delta U -q = 0- (-103.635) = + 103.635` Cal
Also when temperature is CONSTANT,
PV = constant, `Delta H = Delta U + Delta (PV) = 0+ 0 =0`


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