A high pressure gas cylinder contains 45.5 L of toxic gas at a pressure of 1.2X10^7 N/m^2 and a temperature of 29° C. Its valve leaks after the cylinder is dropped. The cylinder is cooled to dry ice temperature of -78.5°C to reduce the leak rate and pressure so that it can be safely repaired. a) what is the final pressure in the tank, assuming a negligible amount of gas leaks while being cooled and that there is no phase change? P2: Pa b) what is the final pressure of one-tenth of the gas escapes? P2: Pa c) to what temperature must the tank be cooled to reduce the pressure to 1.00 atm (assuming the gas does not change phase and that there is no leakage during cooling?) T2: K d) does cooling the tank appear to be a practical solution to bring the pressure down and reduce the leak? Assume N1≈N2. Take into account the values calculatesd in parts (a) and (c). Yes or no?
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
14.
A high pressure gas cylinder contains 45.5 L of toxic gas at a pressure of 1.2X10^7 N/m^2 and a temperature of 29° C. Its valve leaks after the cylinder is dropped. The cylinder is cooled to dry ice temperature of -78.5°C to reduce the leak rate and pressure so that it can be safely repaired.
a) what is the final pressure in the tank, assuming a negligible amount of gas leaks while being cooled and that there is no phase change?
P2: Pa
b) what is the final pressure of one-tenth of the gas escapes?
P2: Pa
c) to what temperature must the tank be cooled to reduce the pressure to 1.00 atm (assuming the gas does not change phase and that there is no leakage during cooling?)
T2: K
d) does cooling the tank appear to be a practical solution to bring the pressure down and reduce the leak? Assume N1≈N2. Take into account the values calculatesd in parts (a) and (c). Yes or no?
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