- Heat and Molecular Physics (^57)
2.9. A vertical thermally insulated cylin-
der of volume V contains n moles of an ideal
monatomic gas under a weightless piston.
p, arbitrary units
50
40
20
2000 3000 t, s
Fig. 62
A load of mass M is placed on the piston,
as a result of which the piston is displaced
by a distance h.
Determine the final temperature Tr of
the gas established after the piston has
been displaced if the area of the piston is S
and the atmospheric pressure is po.
2.10. A vertical cylinder of cross-sectional
area S contains one mole'of an ideal mon-
atomic gas under a piston of mass M. At a
certain instant, a heater which transmits to
a gas an amount of heat q per unit time is
switched on under the piston.
Determine the established velocity v
of the piston under the condition that the
gas pressure under the piston is constant
and equal to po , and the gas under the
piston is thermally insulated.
2,11•. The product of pressure and volume
(p1') of a gas does not change with volume
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