1.

The reversible expansion of an ideal gas under adiabatic and isothermal conditions is shown in the figure. Which of the following statements(s) is (are) correct?

Answer»

<P>`T_(1) = T_(2)`
`T_(3) gt T_(1)`
`W_("isothermal") gt W_("adiabatic")`
`Delta U_("isothermal") gt Delta U_("adiabatic")`

Solution :`V_(i) gt V_(a)` (from graph)
`T_(i) gt T_(a) ( :. T_(i) = T_(1) "&" T_(a) = T_(3) LT T_(1))`
`P_(i) gt P_(a)` (from graph), `W_(i) gt W_(a)` (from graph)
`Delta U_(i) gt Delta U_(a) ( :. Delta U_(i) = 0 "&" Delta U_(a) lt 0)`


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