Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 27.1, Problem 2bTH
A long pin is used to hold the piston in place as shown in the diagram. The cylinder is then placed into boiling water.
b. Sketch this process in the PV diagram at right.
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pin
6. A long pin is now used to hold the piston in place as shown in the
diagram. The cylinder is then placed into boiling water. The valve
remains closed for the whole time.
a. Does the temperature of the gas increase, decrease, or
remain the same?
b. Sketch this process in the PV diagram. Using arrow, indicate the direction of the
process on your graph.
c. Explain why for this particular situation, it is impossible to determine the pressure of
the gas as you did on question 1 (that is, by considering the free-body-diagram of
the piston).
A gas with an initial temperature of 900°C undergoes the process as shown.a. What type of process is this?b. What is the final temperature?c. How many moles of gas are there?
Efficiency: You haven’t been to the grocery store in a while, and all you can find in yourapartment is a few packets of ‘Ramen’ noodles.
a. Calculate how much energy would be needed to raise the two cups of water you needto cook your noodles to its boiling point.
b. List the sources of inefficiency associated with boiling this water in an electric kettle,and find values for or estimate efficiency values for each energy conversion. Trace backas far as your assumed electricity source.
c. How does the situation change if you heat the water on a gas stove? What inefficienciesare avoided, and what are introduced? Estimate (rough estimates are fine, but state your assumptions clearly) the total amount of gas needed to cook your meal.
Chapter 27 Solutions
Tutorials in Introductory Physics
Ch. 27.1 - Prob. 1aTHCh. 27.1 - In this process, which of the quantities P, V, n,...Ch. 27.1 - Consider the following incorrect student...Ch. 27.1 - Explain why it is not possible to use the ideal...Ch. 27.1 - A long pin is used to hold the piston in place as...Ch. 27.1 - A long pin is used to hold the piston in place as...Ch. 27.1 - Prob. 2cTHCh. 27.2 - Prob. 1aTHCh. 27.2 - Prob. 1bTHCh. 27.2 - Prob. 1cTH
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- Referring to the figure shown, water contained in a piston–cylinder assembly, initially at 100 kPa and 25°C. The water is heated until the final temperature reaches to 320°C. Kinetic and potential energy effects are negligible.Sketch the process on T-v diagram. Determinea. The quality of the mixture when piston hits the stop.b. The final pressure.Hint: Establish the problem in three states; 1: initial, 2: when piston hits the stop, 3: at T3 = 320°C.arrow_forward0.0040 mol of gas undergoes the process as shown.a. What type of process is this?b. What are the initial and final temperatures?arrow_forwardAn ideal gas undergoes two thermodynamic processes as shown in FIGURE 1. a. Name the processes AB and BC. b. If the initial temperature is 40°C, find the temperatures at B and C. c. Find the total work done d. What is the total change in internal energy for these processesarrow_forward
- 13 moles of monatomic ideal gas undergoes a thermodynamic process from point a to point c, as shown by the PV diagram in Figure 1. i) Determine the work done ON the gas from point a to point c. ii) Find the temperature of the gas at point b.arrow_forwardA student is asked to sketch a pV diagram for a gas that goes through a cycle consisting of (a) an isobaric expansion, (b) a constant-volume reduction intemperature, and (c) an isothermal process that returns the gas to its initial state. The student draws the diagram as shown. What, if anything, is wrong with the student’s diagram?arrow_forwardWhat is the heat delivered to the gas for process #2 (the diagonal line process) as illustrated on the pV diagram below? The gas is monatomic. You must get the sign correct. P (Pa) 7 2 3 V(m³) 07J O-7J 3J -3J OJ 3 2 4arrow_forward
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- Answer the following questions about the PV diagram shown below. Please refer to the picture. Question A: How much work is performed in the process AB? Please give the answer in joules Question B: How much work is performed in the process BD? Please give the answer in joules Question C: How much work is peformed in the process AC? Please give the answer in joulesarrow_forward13 moles of monatomic ideal gas undergoes a thermodynamic process from point a topoint c, as shown by the PV diagram in Figure 1. i) Determine the work done ON the gas from point a to point c ii) Find the temperature of the gas at point barrow_forwardShown below are bar charts for processes involving ideal gasses. For each, draw the appropriate line or curve on the PV graph, including an arrow for direction. Explain. 1. Temperature Pressure Volume bul IF IF I F 2. Temperature Pressure Volume T I FI FI F 4. I F IF I F P Temperature Pressure Volume 7 G I FI FI F P 3. For this, use the ideal gas law as a guide: Temperature Pressure Volume P V P V Varrow_forward
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