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pressure & state change

pressure & state change

pressure & state change

(OP)
An amonia absorbtion refrigeration system uses nitrogen to cause a temperature change in the evaperator.  If an amonia gas is trapped in a chamber at normal system pressure, then nitrogen is injected, will there be total pressure decrease within that chamber?  External chamber temperature will decrease 60 to 100 degree F temperature range.  I don't know if the injection of the nitrogen gas will replace the gas volume that changes into a liquid.
Thanks   Dr Killroy

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