An ideal gas undergoes a process during which the pressure is kept directly proportional to the volume, so that p = aV, where a is a positive constant. If the volume changes from V1 to V2, how much work is done by the gas? Express your answer in terms of V1, V2, and a.
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An ideal gas undergoes a process during which the
pressure is kept directly proportional to the volume, so that p = aV,
where a is a positive constant. If the volume changes from V1 to V2,
how much work is done by the gas? Express your answer in terms of
V1, V2, and a.
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- As a gasoline engine is running, an amount of gasoline containing 13,600 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,400 J of work. (a) What is the engine's efficiency (in percent)? % (b) The burning gasoline has a temperature of about 4,100°F (2,500 K). The waste heat from the engine flows into air at about 90°F (305 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures? Need Help? % Read ItA real (non-Carnot) heat engine, operating between heat reservoirs at temperatures of 524 and 287 performs 2.4 kJ of net work and rejects 3.6 kJ of heat in a single cycle. What is the thermal efficiency of this heat engine in decimal form ( with two decimal places)?A hand-driven tire pump has a piston with a 2.00 cm diameter and a maximum stroke of 36.0 cm. (a) How much work (in J) do you do in one stroke if the average gauge pressure is 2.40 x 10° N/m (about 35 psi)? J (b) What average force (in N) do you exert on the piston, neglecting friction and gravity? N Additional Materials Reading ES Scanned with CamScanner Submit Answer
- The temperature at state A is 20.0°C, that is 293 K. During the last test, you have found the temperature at state D is 73.0 K and n = 164 moles for this monatomic ideal gas. What is the change in thermal energy for process A to D, in MJ (MegaJoules)? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. P (atm) 4 3 ID B +V (m) 4 5HelpA gas expands from I to F in the figure below. The energy added to the gas by heat is 212 J when the gas goes from I to F along the diagonal path. Three paths are plotted on a PV diagram, which has a horizontal axis labeled V (liters), and a vertical axis labeled P (atm). The green path starts at point I (2,4), extends vertically down to point B (2,1), then extends horizontally to point F (4,1). The blue path starts at point I (2,4), and extends down and to the right to end at point F (4,1). The orange path starts at point I (2,4), extends horizontally to the right to point A (4,4), then extends vertically down to end at point F (4,1). (a) What is the change in internal energy of the gas? Use the relations between various features of the graph and the work done on the gas to find the energy added by work and then use your result to find the change in internal energy of the gas. J(b) How much energy must be added to the gas by heat for the indirect path IAF to give the same change in…
- A mixture of xenon and oxygen gas is compressed from a volume of 87.0 L to a volume of 81.0 L, while the pressure is held constant at 84.0 atm. Calculate the work done on the gas mixture. Be sure your answer has the correct sign (positive or negative) and the correct number of significant digits. KJ x10 XFind the amount of work W done on the gas during the entire process? express answer in terms of some or all of the variables p and V W = ?The heat engine shown in the figure uses 2.0 mol of a monatomic gas as the working substance. (Figure 1) Figure p (kPa) 600 400 200- 0 0 0.025 0.050 V (m³) Part A Determine T₁, T₂, and T₁. Enter your answers numerically separated by commas. Express your answer using two significant figures. T₁ T₂. T₂ = 600,1800,1200 K Submit Previous Answers ✓ Correct Part B Determine AEth. W. and Q for 1-2. Enter your answers numerically separated by commas. Express your answer using two significant figures. AEth. Ws. Q = 3.0x104.1.3x104.4.3x104 J Submit ✓ Correct ▾ Part C Previous Answers Determine AEth. W. and Q for 2-3. Enter your answers numerically separated by commas. Express your answer using two significant figures. AEth. Ws. Q= Submit ▾ Part D ΠΑΣΦ Request Answer I ? J
- Estilos Edición P5. A rigid container contains water vapor at 250°C and an unknown pressure. When the container cools to 150°C, the vapor begins to condense. Estimate the initial pressure in the container. Plot the thermodynamic process on a phase diagram. Answer: 600 kPa.The heat supplied is 500 J. The heat loss to the environment is 160 J. Step 2 Calculation: Write the expression for the work output from the heat engine. W=Q1-Q2 Here, W is the useful workout, Q1 is the supplied heat, and Q2 is the heat loss. Substitute, all known values in the above expression. W=400 J-160 J=240 J Thus, the useful work is 240 J. What is the efficiency of the heat engine in the preceding problem at top? a) 32% b) 54% c) 68%. d) 75% e) 175%-70 J of work are done on the gas in the process shown in (Figure 1). Figure p (kPa) P₁ 0+ 0 100 200 300 < 1 of 1 V (cm³) Part A What is p₁ in kPa? Express your answer in kilopascals. P1 = Submit VE ΑΣΦ Provide Feedback Request Answer ***** ? kPa