Physics โ Problems and solutions
1. An ideal gas initially at 300 K undergoes an isobaric expansion at 2.5 kPa. If the
volume increases from 1 ๐๐3 to 3 ๐๐3 and 12.5 kJ is transferred to the gas by heat,
what are (a) the change in its internal energy and (b) its final temperature
2. An ideal gas is taken through a quasi-static process described by ๐๐=๐พ๐พ๐๐2, with
๐พ๐พ= 5 ๐๐๐๐๐๐/๐๐6. The gas is expanded to twice its original volume of 1 ๐๐3. How much
work is done on the expanding gas in this process?
3. ๐๐ moles of an ideal gas at temperature ๐๐1 and volume ๐๐1 expand isothermally until
the volume has doubled. In terms of ๐๐, ๐๐1 and ๐๐1, what are (a) the work done on the
gas, and (b) the heat energy transferred to the gas?
