CHEM 1201 : Fall 2012 Exam 4 With Answers
Document Summary
In the fall 2013, the exam will last only 50 minutes and the number of questions will not exceed 20 (plus bonus) Encode your answers on the scantron sheet with soft pencil. Encode 1 under grade or education on the scantron sheet: a sample of an ideal gas at pressure, p1, has its absolute temperature doubled at the same time its volume is cut in half. What is the new pressure exerted by the gas, p2: p2 = p1, p2 = 2p1, p2 = p1/2, p2 = 4p1, p2 = p1/4. A balloon originally has a volume of 4. 39 l at 44. 1 c and a pressure of 729 mmhg. If the pressure is kept constant, to what temperature (in c) must the balloon be cooled, to reduce its volume to 3. 78 l: -177 c, 17 c, 7. 1 c, -71 c, ~0 c. Predict whether the pressure increases, decreases, or remains the same during gas-phase reactions and select the best answer.
