(1) In refrigerant R134a, calculate the temperature and enthalpy h (kJ/kg) at a pressure of 1 MPa and a specific volume of 0.01474 m^ 3 /kg.
(1) In refrigerant R134a, calculate the temperature and enthalpy h (kJ/kg) at a pressure of 1 MPa and a specific volume of 0.01474 m^ 3 /kg.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
Show P - V or T - V diagram and indicate corresponding state.
![5. Answer the questions about the conditions
of the given phase change material.
(1) In refrigerant R134a, calculate the
temperature and enthalpy h (kJ/kg) at a
pressure of 1 MPa and a specific volume of
0.01474 m^ 3 /kg.
(2) In refrigerant R134a, calculate the
pressure and enthalpy (kJ/kg) at -20°C and a
specific volume of 0.1 m^ 3 /kg.
(3) In a 0.1m^3 volume container, there is
water with a pressure of 1 MPa and a
temperature of 250°C. Find the mass of water
(kg).
(4) At a pressure of 0.4 MPa, 2 kg of water is
contained in a 0.4 m^3 container. Find the
temperature in the container and the internal
negative energy (kj/kg).
(5) A container with a volume of 3 m^3
contains 5 kg of water with a pressure of 200
kPa. Find the temperature and internal
energy (kJ/kg).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbede4c1f-e05a-4813-b14f-d8e8233dfc56%2Ff8b4f6a7-133c-46f6-a5d9-1ea50eaa58e1%2F92viro_processed.jpeg&w=3840&q=75)
Transcribed Image Text:5. Answer the questions about the conditions
of the given phase change material.
(1) In refrigerant R134a, calculate the
temperature and enthalpy h (kJ/kg) at a
pressure of 1 MPa and a specific volume of
0.01474 m^ 3 /kg.
(2) In refrigerant R134a, calculate the
pressure and enthalpy (kJ/kg) at -20°C and a
specific volume of 0.1 m^ 3 /kg.
(3) In a 0.1m^3 volume container, there is
water with a pressure of 1 MPa and a
temperature of 250°C. Find the mass of water
(kg).
(4) At a pressure of 0.4 MPa, 2 kg of water is
contained in a 0.4 m^3 container. Find the
temperature in the container and the internal
negative energy (kj/kg).
(5) A container with a volume of 3 m^3
contains 5 kg of water with a pressure of 200
kPa. Find the temperature and internal
energy (kJ/kg).
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