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As shown here, one type of computer keyboard cleaner
Chapter , Problem 19.2(choose chapter or problem)
As shown here, one type of computer keyboard cleaner contains liquefied 1,1-difluoroethane 1C2H4F22, 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? (c) Predict whether S is 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 enthalpy or entropy? [Sections 19.1 and 19.2]
Questions & Answers
QUESTION:
As shown here, one type of computer keyboard cleaner contains liquefied 1,1-difluoroethane 1C2H4F22, 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? (c) Predict whether S is 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 enthalpy or entropy? [Sections 19.1 and 19.2]
ANSWER:Problem 19.2As shown here, one type of computer keyboard cleaner contains liquefied 1,1-difluoroethane1C2H4F22, 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 positiveor negative (c) Predict whether S is positive or negative for this process. (d) Given youranswers to (a), (b), and (c), do you think the operation of this product depends more on enthalpyor entropy [Sections 19.1 and 19.2] Step-by-step solution Step 1 of 6 ^Analyze - We are asked about the spontaneous process, heat flows and entropy change.