Initially contains Air: P1 = 30 lbf/in^2 T1 = 540 °F V1 = 4 ft^3 Second phase of process involving Air to a final state: P2 = 20 lbf/in^2 V2 = 4.5 ft^3 Wheel transfers energy TO the air by WORK at 1 Btu. Energy transfers TO the air by HEAT at 12 Btu. Ideal Gas Behavior. Find T2 in Radians.

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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**Initial Conditions:**

- **Pressure (P1):** 30 lbf/in²
- **Temperature (T1):** 540 °F
- **Volume (V1):** 4 ft³

**Final Conditions:**

- **Pressure (P2):** 20 lbf/in²
- **Volume (V2):** 4.5 ft³

**Energy Transfer:**

- **Work Done on Air (by Wheel):** 1 Btu
- **Heat Transfer to Air:** 12 Btu

Note: The process follows **Ideal Gas Behavior**.

**Objective:**

Calculate Temperature (T2) in radians.

**Diagram Description:**

The diagram depicts a closed system containing air, with a piston and a rotating wheel doing work. 

- **Q = -12 Btu:** Represents the heat energy transferred to the system.
- **WpW = -1 Btu:** Indicates the work done on the system via the wheel.
- **Wpis = ? :** Denotes the unknown work done by the piston.

The initial and final conditions are labeled clearly with the pressure, volume, and temperature values for reference.
Transcribed Image Text:**Initial Conditions:** - **Pressure (P1):** 30 lbf/in² - **Temperature (T1):** 540 °F - **Volume (V1):** 4 ft³ **Final Conditions:** - **Pressure (P2):** 20 lbf/in² - **Volume (V2):** 4.5 ft³ **Energy Transfer:** - **Work Done on Air (by Wheel):** 1 Btu - **Heat Transfer to Air:** 12 Btu Note: The process follows **Ideal Gas Behavior**. **Objective:** Calculate Temperature (T2) in radians. **Diagram Description:** The diagram depicts a closed system containing air, with a piston and a rotating wheel doing work. - **Q = -12 Btu:** Represents the heat energy transferred to the system. - **WpW = -1 Btu:** Indicates the work done on the system via the wheel. - **Wpis = ? :** Denotes the unknown work done by the piston. The initial and final conditions are labeled clearly with the pressure, volume, and temperature values for reference.
Expert Solution
Step 1

Given

  Final pressure, P2 = 20 lbf/in2 = 137.9 kPa

   Final volume, V2 = 4.5 ft3 = 0.127 m3

    Gas constant, R = 0.287 kJ/kg.K

Find

  Final temperature, T2

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