1.

A cyclic process 1rarr2rarr3rarr1 shown in P-T diagram is performed with a constant mass of an ideal gas. Show it on a (a) P-V diagram (b) V-T

Answer»

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Solution :

(a) `1rarr2` is an inclined line passing through origin i.e., it represents isochoric process (V: constant)
`1rarr2` P is increasing
`2rarr3`: Pressure is constant
`PV=nRTimpliesVpropT`
As TEMPERATURE is decreasing, HENCE, volume is decreasing.
`3rarr1` Temperature is constant `P-V` diagram will be rectangular hyperbola. In `3rarr1`, pressure is decreasing The `P-V` diagram will be
(B) `1rarr2`: Volume is constant, temperature is increasing `2rarr3`: P is constant , on `V-T` diagram `2rarr3` will straight line through origin. T is decreasing.
`3rarr1`: T is constant, P is decreasint i.e., volume is increasig (since `PV=nRT`)


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