The experiment aims to determine the efficiency of changing a gas's state by measuring the work done on the gas during compression using Boyle's law, timing how long it takes to compress the gas fully, and calculating efficiency by dividing the power output by the power input from the battery over time. The apparatus includes a chamber to compress the gas and a stopwatch to time compression. Gas pressure and volume are recorded at different states to calculate work done using the formula for constant temperature.

1. EXPERIMENT :
Finding the efficiency of change of state of gas
apparatus.
Apparatus :
 Change of state of gas
 Stop watch
Theory :
Work done on the gas can be found in boyle’s law
by findung area under the curve . E nergy supplied
can be found by timing the experiment and
multiplying by power of the battery.

2. Procedure :
 First we increase pressure of gas inside the
chamber .
 Due to which volume decreases.
 We note the time which is taken by the whole
gas to be compressed.
 By using the formula of costant temperature
we calculate the work done.
 Now we divide the total work done by total
time.
 By doing this power comes.
 Then power is divided by energy supplied per
unit time .
 From this efficiency comes out .
Table :
P(kpa) V W(J) P(watt) Energy
(j/s)
efficency