7. Dry air, occupying a volume V at temperature T1 and pressure P, is passed over substance A at temperature T2 and is saturated with the vapors of this substance. How much will the mass of the substance change after the air is passed through? Take the vapor pressure of substance A at temperature T2 from the tables. When calculating, take into account that the total pressure in the system remains unchanged and equal to P during the entire process.
option T1,K P*10-4, Pa, Vm3 Substance A T2,K
7 295 9.785 9 CCl2 318
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