Thermodynamics: An Engineering Approach
9th Edition
ISBN: 9781260048766
Author: CENGEL
Publisher: MCG
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Chapter 12.6, Problem 26P
To determine
The enthalpy of vaporization of water at
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Chapter 12 Solutions
Thermodynamics: An Engineering Approach
Ch. 12.6 - What is the difference between partial...Ch. 12.6 - Consider the function z(x, y). Plot a differential...Ch. 12.6 - Consider a function z(x, y) and its partial...Ch. 12.6 - Prob. 4PCh. 12.6 - Prob. 5PCh. 12.6 - Consider a function f(x) and its derivative df/dx....Ch. 12.6 - Conside the function z(x, y), its partial...Ch. 12.6 - Consider air at 350 K and 0.75 m3/kg. Using Eq....Ch. 12.6 - Consider air at 350 K and 0.75 m3/kg. Using Eq....Ch. 12.6 - Nitrogen gas at 800 R and 50 psia behaves as an...
Ch. 12.6 - Consider an ideal gas at 400 K and 100 kPa. As a...Ch. 12.6 - Using the equation of state P(v a) = RT, verify...Ch. 12.6 - Prove for an ideal gas that (a) the P = constant...Ch. 12.6 - Verify the validity of the last Maxwell relation...Ch. 12.6 - Verify the validity of the last Maxwell relation...Ch. 12.6 - Show how you would evaluate T, v, u, a, and g from...Ch. 12.6 - Prob. 18PCh. 12.6 - Prob. 19PCh. 12.6 - Prob. 20PCh. 12.6 - Prove that (PT)=kk1(PT)v.Ch. 12.6 - Prob. 22PCh. 12.6 - Prob. 23PCh. 12.6 - Using the Clapeyron equation, estimate the...Ch. 12.6 - Prob. 26PCh. 12.6 - Determine the hfg of refrigerant-134a at 10F on...Ch. 12.6 - Prob. 28PCh. 12.6 - Prob. 29PCh. 12.6 - Two grams of a saturated liquid are converted to a...Ch. 12.6 - Prob. 31PCh. 12.6 - Prob. 32PCh. 12.6 - Prob. 33PCh. 12.6 - Prob. 34PCh. 12.6 - Prob. 35PCh. 12.6 - Prob. 36PCh. 12.6 - Determine the change in the internal energy of...Ch. 12.6 - Prob. 38PCh. 12.6 - Determine the change in the entropy of helium, in...Ch. 12.6 - Prob. 40PCh. 12.6 - Estimate the specific heat difference cp cv for...Ch. 12.6 - Derive expressions for (a) u, (b) h, and (c) s for...Ch. 12.6 - Derive an expression for the specific heat...Ch. 12.6 - Derive an expression for the specific heat...Ch. 12.6 - Derive an expression for the isothermal...Ch. 12.6 - Prob. 46PCh. 12.6 - Show that cpcv=T(PT)V(VT)P.Ch. 12.6 - Show that the enthalpy of an ideal gas is a...Ch. 12.6 - Prob. 49PCh. 12.6 - Show that = ( P/ T)v.Ch. 12.6 - Prob. 51PCh. 12.6 - Prob. 52PCh. 12.6 - Prob. 53PCh. 12.6 - Prob. 54PCh. 12.6 - Prob. 55PCh. 12.6 - Does the Joule-Thomson coefficient of a substance...Ch. 12.6 - The pressure of a fluid always decreases during an...Ch. 12.6 - Will the temperature of helium change if it is...Ch. 12.6 - Estimate the Joule-Thomson coefficient of...Ch. 12.6 - Estimate the Joule-Thomson coefficient of...Ch. 12.6 - Prob. 61PCh. 12.6 - Steam is throttled slightly from 1 MPa and 300C....Ch. 12.6 - What is the most general equation of state for...Ch. 12.6 - Prob. 64PCh. 12.6 - Consider a gas whose equation of state is P(v a)...Ch. 12.6 - Prob. 66PCh. 12.6 - What is the enthalpy departure?Ch. 12.6 - On the generalized enthalpy departure chart, the...Ch. 12.6 - Why is the generalized enthalpy departure chart...Ch. 12.6 - What is the error involved in the (a) enthalpy and...Ch. 12.6 - Prob. 71PCh. 12.6 - Saturated water vapor at 300C is expanded while...Ch. 12.6 - Determine the enthalpy change and the entropy...Ch. 12.6 - Prob. 74PCh. 12.6 - Prob. 75PCh. 12.6 - Prob. 77PCh. 12.6 - Propane is compressed isothermally by a...Ch. 12.6 - Prob. 81PCh. 12.6 - Prob. 82RPCh. 12.6 - Starting with the relation dh = T ds + vdP, show...Ch. 12.6 - Using the cyclic relation and the first Maxwell...Ch. 12.6 - For ideal gases, the development of the...Ch. 12.6 - Show that cv=T(vT)s(PT)vandcp=T(PT)s(vT)PCh. 12.6 - Temperature and pressure may be defined as...Ch. 12.6 - For a homogeneous (single-phase) simple pure...Ch. 12.6 - For a homogeneous (single-phase) simple pure...Ch. 12.6 - Prob. 90RPCh. 12.6 - Prob. 91RPCh. 12.6 - Estimate the cpof nitrogen at 300 kPa and 400 K,...Ch. 12.6 - Prob. 93RPCh. 12.6 - Prob. 94RPCh. 12.6 - Prob. 95RPCh. 12.6 - Methane is to be adiabatically and reversibly...Ch. 12.6 - Prob. 97RPCh. 12.6 - Prob. 98RPCh. 12.6 - Prob. 99RPCh. 12.6 - An adiabatic 0.2-m3 storage tank that is initially...Ch. 12.6 - Prob. 102FEPCh. 12.6 - Consider the liquidvapor saturation curve of a...Ch. 12.6 - For a gas whose equation of state is P(v b) = RT,...Ch. 12.6 - Prob. 105FEPCh. 12.6 - Prob. 106FEP
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- 4) A sample of argon at 01 atm pressure and 25C expands reversibly and adiabatically from 0.5 L to 1.0 L. Calculate its final temperature, the work done during the expansion, and the change in internal energy. The molar heat capacity of argon at constant volume is 12.48 JK-1mol-1.arrow_forwardA 653 g/h stream of methyl alcohol, also called methanol, at 6.0atm 10.0C was held at constant pressure, vaporized, and brought to 241.0C. At what rate must heat, be supplied to this system ? Assume that methyl alcohol vapor behaves ideally for the temperature range and pressure given.arrow_forwardGiven that μ = 0.25Katm−1 for nitrogen, calculate the value of its isothermal Joule–Thomson coefficient. Calculate the energy that must be supplied as heat to maintain constant temperature when 15.0 mol N2 flows through a throttle in an isothermal Joule–Thomson experiment and the pressure drop is 75 atm.arrow_forward
- where are you finding v=0.0159939 m3/kg ? , when I look for the specific volume for saturate steam at 11000 kpa , I am finding vg=15.987 ?arrow_forward0.15 m3 of an ideal gas at a pressure of 15 bar and 552 K is expanded isothermally to 4 times the initial volume. It is then cooled to 290K at constant volume and then compressed back polytropically to its initial state. Calculate the net work done and heat transferred during the cyclearrow_forwardA mole sample of liquid ammonia at 273 Kelvin is cooled to liquid ammonia at 240 Kelvin. The process is done irreversibly by placing the sample in liquid nitrogen at 77 Kelvin. The heat capacity relationship for ammonia gas is given below. Assuming that the heat of vaporization is 23.4 KiloJoules per mole, answer the questions that follow. What is the entropy change of this process (in Joules per Kelvin)? Express answer in THREE SIGNIFICANT FIGURES. What is the entropy change of the surroundings for this process (in Joules per Kelvin)? Express answer in THREE SIGNIFICANT FIGURES. What is the total entropy change (or the entropy of the universe) for this process (in Joules per Kelvin)? Express answer in THREE SIGNIFICANT FIGURES.arrow_forward
- Steam at a pressure of 3.5 MPa is known to have a specific volume of 50×10*-3 m*3/kg. Find the enthalpy of the mixture ink KJ/s if the mass flow rate of the steam is 3.443 kg/s.arrow_forwardUsing the Clapeyron equation, estimate the enthalpy of vaporization of refrigerant-134a at 46°C. Use data from the tables. The enthalpy of vaporization of refrigerant-134a at 46°C is kJ/kg.arrow_forwardEstimate the Joule-Thomson coefficient for steam at 3MPA and 300°C using the steam tables. Estimate the Joule-Thomson coefficient for steam at 6MPA and 500°C using the steam tables. During phase change the Joule-Thomson coefficient is always positive or negative? Using gure A-14E (or A-14) in the tables of your book, is the Joule-Thomson coefficient ever negative for r134a? If so, where is it negative relative to temperature and pressure?arrow_forward
- A frictionless piston-cylinder contains 42 kilograms of Acetylene having a pressure of 22 bar at 320 degrees Celsius. Heating occurs at constant pressure causing the piston to move until the volume is tripled. Compute for the (a) heat, (b) change in internal energy, (c) change in enthalpy (d) change in entropy, and (e) the non-flow work. (f) If ΔPE = 0.2 kJ and ΔKE = 1.35 kJ, what is the steady-flow work?arrow_forwardPlease solve this correctlyarrow_forwardA 1.40 kg sample of water at 15.0°C is in a calorimeter. You drop a piece of steel with a mass of 0.330 kg at 230°C into it. After the sizzling subsides, what is the final equilibrium temperature (in °C)? (Make the reasonable assumptions that any steam produced condenses into liquid water during the process of equilibration and that the evaporation and condensation don't affect the outcome.) °Carrow_forward
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