Explanation The temperature is constant so that the process is isothermal. Write the equation for the work done in an isothermal process. − W = n R T ln ( V 2 V 1 ) (I) Here, W is the work, n is the number of moles, R is the universal gas constant, T is the temperature, V 2 is the final volume and V 1 is the initial volume. Write the ideal gas equation. p V = n R T (II) Here, p is the pressure, V is the volume, n is the number of moles, R is the universal gas constant and T is the temperature. n and R constant. For the isothermal process T is also constant so that right-hand side of the above equation is constant. This implies the left-hand side also must be constant. Write the equation for the isothermal process. p 1 V 1 = p 2 V 2 Here, p 1 is the initial pressure and p 2 is the final pressure. Rearrange the above equation. V 2 V 1 = p 1 p 2 (III) Put equations (II) and (III) in equation (I)

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First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of en…

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Chapter 18, Problem 30E

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The work done on the air as it compresses.

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Chapter 18, Problem 29E

Chapter 18, Problem 31E

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Ch. 18.2 - Two identical gas-cylinder systems are taken from...Ch. 18.2 - Name the basic thermodynamic process involved when...Ch. 18.3 - The same amount of heat flows into equal volumes...Ch. 18 - Prob. 1FTD Ch. 18 - Prob. 2FTD Ch. 18 - Why cant an irreversible process be described by a...Ch. 18 - Are the initial and final equilibrium states of an...Ch. 18 - Prob. 5FTD Ch. 18 - Figure 18.18 shows two processes, A and B. that...Ch. 18 - When you let air out of a tire, the air seems...

Ch. 18 - Blow on the back of your hand with your mouth wide...Ch. 18 - Three identical gas-cylinder systems are...Ch. 18 - Prob. 10FTD Ch. 18 - Prob. 11E Ch. 18 - Prob. 12E Ch. 18 - A 40-W heat source is applied to a gas sample for...Ch. 18 - Find the rate of heat flow into a system whose...Ch. 18 - In a certain automobile engine, 17% of the total...Ch. 18 - An ideal gas expands from the state (p1, V1) to...Ch. 18 - Repeat Exercise 20 for a process that follows the...Ch. 18 - A balloon contains 0.30 mol of helium. It rises,...Ch. 18 - The balloon of Exercise 22 starts at 100 kPa...Ch. 18 - How much work does it take to compress 2.5 mol of...Ch. 18 - By what factor must the volume of a gas with =...Ch. 18 - Prob. 22E Ch. 18 - A carbon-sequestration scheme calls for...Ch. 18 - A gas mixture contains 2.5 mol of O2 and 3.0 mol...Ch. 18 - A mixture of monatomic and diatomic gases has...Ch. 18 - What should be the approximate specific-heat ratio...Ch. 18 - Prob. 27E Ch. 18 - Prob. 28E Ch. 18 - Example 18.2: A gas bubble develops from...Ch. 18 - Prob. 30E Ch. 18 - Example 18.2: A spherical balloon is placed inside...Ch. 18 - Prob. 32E Ch. 18 - Example 18.4: An ideal gas with γ = 40 and...Ch. 18 - Prob. 34E Ch. 18 - Example 18.4: An ideal gas with γ = 1.40 is...Ch. 18 - An ideal gas expands to 10 times its original...Ch. 18 - During cycling, the human body typically releases...Ch. 18 - A 0.25-mol sample of ideal gas initially occupies...Ch. 18 - As the heart beats, blood pressure in an artery...Ch. 18 - It takes 1.5 kJ to compress a gas isothermally to...Ch. 18 - A gas undergoes an adiabatic compression during...Ch. 18 - A gas with = 1.40 occupies 6.25 L when its at...Ch. 18 - A gas sample undergoes the cyclic process ABCA...Ch. 18 - Prob. 44P Ch. 18 - A gasoline engine has compression ratio 8.5 (sec...Ch. 18 - By what factor must the volume of a gas with =...Ch. 18 - Volvos B5340 engine, used in the V70 series cars,...Ch. 18 - A research balloon is prepared for launch by...Ch. 18 - Prob. 49P Ch. 18 - By what factor does the internal energy of an...Ch. 18 - A 3.50-mol sample of ideal gas with molar specific...Ch. 18 - Prove that the slope of an adiabat at a given...Ch. 18 - An ideal gas with = 1.67 starts at point A in...Ch. 18 - The gas of Example 18.4 starts at state A in Fig....Ch. 18 - The gas of Example 18.4 starts at state A in Fig....Ch. 18 - Prob. 56P Ch. 18 - Youre the product safety officer for a company...Ch. 18 - Figure 18.22 shows data and a fit curve from an...Ch. 18 - Gasoline and diesel engines often use...Ch. 18 - A gas with = 7/5 is at 273 K when its compressed...Ch. 18 - An ideal gas with = 1.3 is initially at 273 K and...Ch. 18 - The curved path in Fig. 18.23 lies on the 350-K...Ch. 18 - Repeat part (a) of Problem 62 for the path ACDA in...Ch. 18 - A gas mixture contains monatomic argon and...Ch. 18 - How much of a triatomic gas with Cv = 3R would you...Ch. 18 - An 8.5-kg rock at 0C is dropped into a...Ch. 18 - A piston-cylinder arrangement containing 0.30 mol...Ch. 18 - Experimental studies show that the pV curve for a...Ch. 18 - Show that the application of Equation 18.3 to an...Ch. 18 - Prob. 70P Ch. 18 - Prob. 71P Ch. 18 - The table below shows measured values of pressure...Ch. 18 - Air with initial volume V0 = 4.50 L and initial...Ch. 18 - A real gas is more accurately described using the...Ch. 18 - Repeat Exercise 20 for an expansion along the path...Ch. 18 - The adiabatic lapse rate is the rate at which air...Ch. 18 - A power plant extracts thermal energy from its...Ch. 18 - Prob. 78P Ch. 18 - One scheme for reducing greenhouse-gas emissions...Ch. 18 - Warm winds called Chinooks (a Native-American term...Ch. 18 - Warm winds called Chinooks (a Native-American term...Ch. 18 - Warm winds called Chinooks (a Native-American term...Ch. 18 - Warm winds called Chinooks (a Native-American term...

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