1. Two monatomic ideal gas experiments were performed in a laboratory. The data
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Question
1. Two monatomic ideal gas experiments were performed in a laboratory. The data calculated from these experiments are in the table below. In both experiments the initial conditions were 3L, 35C and 0.9atm. From the data please answer the following questions:
a. Was the experiment done isothermally, adiabatically, or in a combination of isothermal and adiabatic steps? Explain your answer.
b. Calculated the final conditions of the gas for each experiment given the final temperature (see, table below): Vf and Pf.
W (J)
Q(J)
Ssys (J/K)
Tf (K)
Experiment 1
389
0
-3.7
600
Experiment 2
808
-486
-1.3
550
W (J)
Q(J)
Ssys (J/K)
Tf (K)
Experiment 1
389
0
-3.7
600
Experiment 2
808
-486
-1.3
550
Explanation / Answer
1.
a. The experiment was done in a combination of isothermal and adiabatic steps.
Because from the initial condition both temperature(T) value and heat (Q) values are changing during the experiment. Nothing is fixed/constant here.
b. by using this following formula,
W=nRT ln (Vf/Vi)
or W= nRT ln (Pi/Pf)
you could calculate for this two experiment for isothermal process.
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