An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is :
a)
–9.0
b)
–0.9
c)
–2.0
d)
+10.0
a)
–9.0
b)
–0.9
c)
–2.0
d)
+10.0
Question ID - 56384 | SaraNextGen Top Answer An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is :
a)
–9.0
b)
–0.9
c)
–2.0
d)
+10.0
An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is :
|
a) |
–9.0 |
b) |
–0.9 |
|
c) |
–2.0 |
d) |
+10.0 |
1 Answer
127 votes
Answer Key / Explanation : (b) -
w = −P
V
= − ( 1 bar) × (9 L)
= − (105 Pa) × (9 × 10−3) m3
= −9 × 102 N-m
= −900 J
= −0.9 kJ
127 votes
Answer Link
127