Quiztag 3
1- work is done in a thermal dynamic process when the volume of the system …….
a) remains constant
b) increases
c) decreases
d) both (b) and (c)
…………..is a collection of matter within a clearly defined boundary across which no matter
passes
a.
b.
c.
d.
thermal dynamic system
environment
both (a) and (b)
neither (a) nor (b)
what does it mean by (-W)
a)
b)
c)
d)
Work done by gas
Work done on gas
Work is not done
None of them
An engine cylinder has a cross-sectional area of 0.010 m2. How much work can be done by gas
in the cylinder if the gas exerts a constant pressure of 7.5 x 10⁵ Pa on the piston and moves the
piston a distance of 0.040 m?
a.
b.
c.
d.
W done by the gas = 3 x 10² J
-W done on the gas = -3 x 10² J
-W done by the gas = -3 x 10² J
W done on the gas = 3x 10² J