Two litres of an ideal gas at apressure of 10 atm expands isothermally into a vacuum until its total volume is 10 litres. How much heat is absorbed and how much work is done in the expansion?

Question

Two litres of an ideal gas at apressure of 10 atm expands isothermally into a vacuum until its total volume is 10 litres. How much heat is absorbed and how much work is done in the expansion? (A) 10 J, 10 J (B) 8 J, 10 J (C) 18 J, 0 J (D) 0 J, 0 J

Tardigrade Admin · Accepted Answer

q = -w = Pex (10 -2) = 0(8) = 0 For isothermal expansion in vacuum, Pex = 0

Q. Two litres of an ideal gas at apressure of $10 a t m$ expands isothermally into a vacuum until its total volume is $10$ litres. How much heat is absorbed and how much work is done in the expansion?

$10 J$ , $10 J$

$8 J$ , $10 J$

$18 J$ , $0 J$

$0 J$ , $0 J$

$q = - w = P_{e x} (10 - 2) = 0 (8) = 0$
For isothermal expansion in vacuum, $P_{e x} = 0$

Q. Two litres of an ideal gas at apressure of 10atm expands isothermally into a vacuum until its total volume is 10 litres. How much heat is absorbed and how much work is done in the expansion?

10J, 10J

8J, 10J

18J, 0J

0J, 0J