As you will find, seeing "ice bath" in the description of a thermal process is sometimes an indicator of an isothermal process (insofar as it keeps the temperature of an ideal gas constant). however, this latter conclusion isn't always the case, so you need to evaluate the entire situation. of the following descriptions of thermal processes, which one is an isothermal one?

a. a gas-filled cylinder with a moveable piston and thin walls that is at room temperature is placed in an ice bath and the piston is pulled out while the gas and cylinder cool down to 0° c.

b. a gas-filled cylinder with a moveable piston that is at 300°c is placed in an ice bath so that all the ice and water are turned to steam.

c. a gas-filled cylinder with a moveable piston that is at room temperature is placed under a flame and heated to 300° c. there is an ice bath on the other side of the room.

d. a gas-filled cylinder with a moveable piston and thin walls that is at room temperature has been placed in an ice bath and allowed to cool down to 0°. the piston is then pulled out.

e. a gas-filled cylinder with a moveable piston and thick, insulated walls that is at room temperature is placed in an ice bath and the piston pulled out.

f. a gas-filled cylinder with a moveable piston and thin walls that is at room temperature is placed in an ice bath and allowed to cool down to 0° c while the piston is held in place.