An ideal gas has CV* = 4R. What is the change in entropy of the gas when 25 moles of the gas is compressed isothermally from 0.1 MPa to 0.8 MPa at a temperature of 350 K?
A. 432 J/K
B. -432 J/K
C. -17.3 J/mol•K
D. 17.3 J/mol•K
E. Insufficient information to solve
A. Incorrect. You are making a sign error; entropy should decrease with increasing pressure at constant temperature.
B. Correct. Use Equation 4.59 to solve for ?S and then use the number of moles.
C. Incorrect. This is the change in molar entropy.
D. Incorrect. This is the change in molar entropy with the wrong sign.
E. Incorrect. All the information needed to solve the problem is given. One piece of information is actually superfluous.
You might also like to view...
Motor starting current is referred to as ____________________ current.
Fill in the blank(s) with the appropriate word(s).
List the four types of machines usually used for manufacturing surface mount boards.
What will be an ideal response?
To growers, ____________________ refers to water containing high levels of dissolved lime, in
particular, bicarbonates.
Fill in the blank(s) with the appropriate word(s).The breaking down and utilization of plant foods is called _____________________
Fill in the blank(s) with correct word