ChE102 - Tutorial 4 Solutions - ChE 102 Chemistry for...

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ChE 102 Chemistry for Engineers - Tutorial 4 Solve the following problems either individually or in small groups (3 students maximum). Submit one copy of the solutions per group. Ask the TA for help if you need assistance solving the problems.Problem 1 A breathing mixture is prepared in which He is substituted for N2. The gas is 79% He and 21% O2, by volume. (a)What is the density of this mixture in grams per liter at 25 oC and 1.00 atm? (b)what pressure would the He-O2mixture have the same density as that of air at 25 oC and 1.00 atm? The composition of air is 78.08% N2, 20.95% O2, 0.93% Ar, and 0.036% CO2. Part (a) We need to arrange ideal gas law to include and solve for density ?At
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Problem 2A mixture of argon (Ar) and acetone (CH3COCH3) is trapped in a 1.0 L flask at 298 K and 15 kPa. The acetone decomposes according to the reaction: CH3COCH3(g) C2H4(g) + CO(g) + H2(g) Once the reaction is complete, the final pressure in the flask is measured to be 17.1 kPa at 298 K. If argon is inert in the reaction and all products are in the gas phase, what is the mole fraction of acetone in the original mixture?
(1)
C

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