As shown here, one type of computer keyboard cleaner contains liquefied 1,1-difluoroethane (C2H4F2), which is a gas at atmospheric pressure. When the nozzle is squeezed, the 1,1-difluoroethane vaporizes out of the nozzle at high pressure, blowing dust out of objects.
(a) Based on your experience, is the vaporization a spontaneous process at room temperature?
(b) Defining the 1,1-difluoroethane as the system, do you expect qsys for the process to be positive or negative? Explain.
(c) Predict whether is ?S positive or negative for this process.
(d) Given your answers to (a), (b), and (c), do you think the operation of this product depends more on heat flow or more on entropy change?
