Calculate the final pressure, in atmospheres, for each of the following, if V &

Question

Calculate the final pressure, in atmospheres, for each of the following, if V & n do not change.
A sample of N2 gas with an initial pressure of 715 mmHg at -81’C is heated to 36’C. Express your answer to three significant figures and include the appropriate units. Calculate the final pressure, in atmospheres, for each of the following, if V & n do not change.
A sample of N2 gas with an initial pressure of 715 mmHg at -81’C is heated to 36’C. Express your answer to three significant figures and include the appropriate units.
A sample of N2 gas with an initial pressure of 715 mmHg at -81’C is heated to 36’C. Express your answer to three significant figures and include the appropriate units.

Explanation / Answer

Assuming N2 gas behaves as ideal gas

the gas equation; P1V1/T1 = P2V2/T2

in this problem, , V and n is constant

so, P1/T1 = P2/T2

given, P1 = 715 mm Hg, T1 = -810C = 192 K

P2 = unknown. T2 = 360C = 309 K

or, P2 = P1T2/T1 = 715*309/192 = 1150.703 mm Hg = 1150.703/760 = 1.51 atm.

therefore the final pressure of the gas is 1.51 atm

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