Explanation Write the Clapeyron equation. h f g = T v f g ( d P d T ) sat ≅ T ( v g − v f ) @ 300 kPa ( Δ P Δ T ) sat, 300 kPa (I) Here, the vaporization enthalpy is h f g , the temperature is T , the slope on the saturation curve of P − T diagram is ( d P d T ) sat , the change in pressure is Δ P , the change in temperature is Δ T , the specific volume at saturated liquid + saturated vapor condition is v f g , the specific volume at saturated liquid condition is v f and the specific volume at saturated vapor condition is v g . Refer Table A-5, “Saturated water-Pressure table”. Obtain the following corresponding to the pressure of 300 kPa . T sat @ 300 kPa = T = 133.52 ° C v f = 0.001073 m 3 /kg v g = 0.60582 m 3 /kg Consider two pressures such as 275 kPa and 325 kPa , these pressures can give an average pressure of 300 kPa . Refer Table A-5, “Saturated water-Pressure table”. Obtain the saturated temperatures corresponding to the pressures of 275 kPa and 325 kPa . T sat @ 275 kPa = 130.58 ° C T sat @ 325 kPa = 136.27 ° C Conclusion: The change in pressure ( Δ P ) is expressed as, Δ P = 325 kPa − 275 kPa = 50 kPa The change in temperature ( Δ T ) is expressed as, Δ T = T sat @ 325 kPa − T sat @ 275 kPa = 136

9th Edition

ISBN: 9781266657610

Author: CENGEL

Publisher: MCG CUSTOM

See similar textbooks

Concept explainers

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substan…

Videos

Question

Chapter 12.6, Problem 26P

To determine

The enthalpy of vaporization of water at 300 kPa and compare it with the tabulated value.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 12.6, Problem 24P

Chapter 12.6, Problem 27P

Students have asked these similar questions

Problem 3.30 A piston-cylinder device contains 0.85 kg of refrigerant- 134a at -10°C. The piston that is free to move has a mass of 12 kg and a diameter of 25 cm. The local atmospheric pressure is 100 kPa. Now, heat is transferred to refrigerant-134a until the temperature is 15°C. Determine (a) the final pressure, (b) the change in the volume of the refrigerant, and (c) the change in the enthalpy of the refrigerant-134a. please show Al work step by step

Part 1 The storage tank contains lubricating oil of specific gravity 0.86 In one inclined side of the tank, there is a 0.48 m diameter circular inspection door, mounted on a horizontal shaft along the centre line of the gate. The oil level in the tank rests 8.8 m above the mounted shaft. (Please refer table 01 for relevant SG, D and h values). Describe the hydrostatic force and centre of pressure with the aid of a free body diagram of the inspection door. Calculate the magnitude of the hydrostatic force and locate the centre of pressure. 45° Estimate the moment that would have to be applied to the shaft to open the gate. Stop B If the oil level raised by 2 m from the current level, calculate the new moment required to open the gate. Figure 01

From thermodynamics please fill in the table show all work step by step

Chapter 12 Solutions

THERMODYNAMICS (LL)-W/ACCESS >CUSTOM<

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. 4P Ch. 12.6 - Prob. 5P Ch. 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...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

The enthalpy of vaporization of water at 300 kPa and compare it with the tabulated value.

Solution Summary: The author calculates the enthalpy of vaporization of water at 300kPa and compares it with the tabulated value.

Concept explainers

Videos

The enthalpy of vaporization of water at 300 kPa and compare it with the tabulated value.

Want to see the full answer?

Chapter 12 Solutions