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Engineering and Tech / Thermodynamics: An Engineering Approach 8 / Chapter 4 / Problem 54P

Thermodynamics: An Engineering Approach | 8th Edition | ISBN: 9780073398174 | Authors: Yunus A. Cengel, Michael A. Boles

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Determine the internal energy change of hydrogen, in

Chapter 4, Problem 54P

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QUESTION:

Problem 54P

Determine the internal energy change $\Delta{}u$ of hydrogen, in kJ/kg, as it is heated from 200 to 800 K, using (a) the empirical specific heat equation as a function of temperature (Table A–2c), (b) the c ${\ }_{v\ \ }$ value at the average temperature (Table A–2b), and (c) the c ${\ }_{v\ \ }$ value at room temperature (Table A–2a).

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QUESTION:

Problem 54P

Determine the internal energy change $\Delta{}u$ of hydrogen, in kJ/kg, as it is heated from 200 to 800 K, using (a) the empirical specific heat equation as a function of temperature (Table A–2c), (b) the c ${\ }_{v\ \ }$ value at the average temperature (Table A–2b), and (c) the c ${\ }_{v\ \ }$ value at room temperature (Table A–2a).

ANSWER:

Step 1 of 10

Obtain the empirical equation for specific heat at constant pressure, from TABLE A-2c “ideal-gas specific heats of various common gases”.

For hydrogen,

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