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Water at 100 kPa and 400 K is heated electrically, adding
Chapter 3, Problem 147HP(choose chapter or problem)
Water at 100 kPa and 400 K is heated electrically, adding 700 kJ/kg in a constant-pressure process. Find the final temperature using
a. The water Table B.1
b. The ideal-gas Table A.8
c. Constant specific heat from Table A.5
Questions & Answers
QUESTION:
Water at 100 kPa and 400 K is heated electrically, adding 700 kJ/kg in a constant-pressure process. Find the final temperature using
a. The water Table B.1
b. The ideal-gas Table A.8
c. Constant specific heat from Table A.5
ANSWER:
Solution 147HP
Step 1 of 9
Here we have to calculate the final temperature using different methods, when water is heated electrically at constant pressure.
Given data,
Pressure,
Initial temperature,
Energy added,
To find,
Final temperature,
The change in internal energy during the process is equal to the difference in amount of energy provided and work done,
That is,
Using the work as
We get, ……………….1
Where is the enthalpy.