Chemistry
Holden
41

A rigid cylinder contains a sample of gas at STP. What is the pressure of this gas after the sample is heated to 410 K? (1) 1.0 atm (3) 0.67 atm (2) 0.50 atm (4) 1.5 atm

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(1) Answers
Peanut2

To solve the problem, we assume the sample to be ideal. Then, we use the ideal gas equation which is expressed as PV = nRT. From the conditions of the gas sample, we calculate the pressure as follows: (NOTE: At STP 1 mol is equal to 22.4 L of a molecule) P = nRT / V P = (1 mol) (8.314 Pa m^3/ mol K) (298.15 K) / .0224 L P = 110660 Pa or 1.0 atm Thus, the answer is the value in option 1.

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