301 Quiz_1_Solution

301 Quiz_1_Solution - SOLUTIONS MAE 301: Engineering...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
SOLUTIONS 1 MAE 301: Engineering Thermodynamics I Spring 2010 Quiz 1 Feb 2, 2010 1. (20 points). A closed thermodynamic system is heated by an electric heater with a power of 1 kW for 10 min. During this process, the internal energy of the system is increased by 900 kJ. The work performed by the systems during this process is (a) 300 kJ (b) -300 kJ (c) 0 kJ (d) 900 kJ (e) none of these 1. Electric heater is outside the system. Energy is transferred by heat kJ kJ kJ U Q W W Q U 300 900 600 = = Δ = = Δ 2. Electric heater is inside the system. Energy is transferred by work arbitrary is W arbitrary is Q kJ kJ kJ W Q if U Q W W Q U = = = Δ = = Δ 900 900 0 0 2. A closed system undergoes quasi-equilibrium cycle 1-2-3-4-1 shown in P-V diagram below. The area inside the cycle is A and the area under the curve 1-2-3 is B. (10 points). The change of the internal energy during the cycle is (a) 0 (b) A (c) B (d) A+B (e) none of these (10 points). The amount of energy transferred by heat during the cycle is
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/19/2010 for the course MAE 301 taught by Professor Hassan during the Spring '08 term at N.C. State.

Page1 / 2

301 Quiz_1_Solution - SOLUTIONS MAE 301: Engineering...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online