Question

A 3 cu. m. steel tank with liquefied natural gas (LNG, which is basically Methane) is kept at 150K and has a quality of 64%. There is a temperature sensor

mounted on it and connected to to a control and alarm system in addition to a pressure gage. How much Methane (in kilograms) does the tank hold? At what temperature does the alarm sound if the maximum safe pressure for the tank is 2000 kPa?

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