Question

Question 3 1 pts A gas tank with a volume of 22.1 L contains 4.1 moles of an ideal gas. The initial pressure of the gas is 7.5x10° Pa. The gas is compressed to half its original volume while the pressure stays constant. What is the final temperature of the gas in K? (Note: 1 mº = 1000 L) [Note: if you need to enter a number in scientific notation, use 'e. For example, 1200 = 1.2e3 and 0.0012 = 1.2e-3. Include several decimal places in your calculations and your answer to avoid rounding error. Do not include units with your answer.) Question 4 1 pts Three moles of an ideal gas are compressed at a constant pressure of 4.3x10° Pa from an initial volume of 0.70 mºto a final volume of 0.18 m. How much work was done on or by the gas (in units of J)? Enter a positive work for work done on the gas, or a negative work for work done by the gas. [Note: if you need to enter a number in scientific notation, use 'e! For example, 1200 = 1.2e3 and 0.0012 = 1.2e-3. Include several decimal places in your calculations and your answer to avoid rounding error. Do not include units with your answer.] Question 5 1 pts Three moles of an ideal gas are compressed at a constant pressure of 5.7x10° Pa from an initial volume of 0.76 mºto a final volume of 0.17 m. What is the change in thermal energy of the gas in units of Joules? (Make sure to enter the correct sign, positive or negative.) [Note: if you need to enter a number in scientific notation, use 'e. For example, 1200 = 1.2e3 and 0.0012 = 1.2e-3. Include several decimal places in your calculations and your answer to avoid rounding error. Do not include units with your answer.]

Answer 1

solution According to ideal Gas haw PU = URT - 40188.314 XT 715x105 x 2201 1000 T = 486.25 k Now, since volume i halwed at constant pressure I= 12 9 - " T2 = 72 11/2 9 = 486.25 = 243.12K