Midterm1Sp10a-s

Midterm1Sp10a-s - MidTerm Ia Name: Date: Phys224 Spring...

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Unformatted text preview: MidTerm Ia Name: Date: Phys224 Spring 2010 Dr. P. Hanlet Show your work!!! If I can read it, I will give you partial credit!!! Correct answers without work will NOT get full credit. Concept (3 points each) Circle the best answer: 1. For an adiabatic process, restate the First Law of Thermodynamics. (a) E = Q W (b) E = W (c) Q = 0 (d) E = Q (e) none of the previous 2. Which statement is true do to the Equipartition Theorem? (a) He gas has <K > = 1 2 kT (b) O 2 gas has <K > = 3 2 kT (c) He gas has <K > = 5 2 kT (d) O 2 gas has <K > = 3 2 RT (e) He gas has <K> = 3 2 kT 3. The constant k in the Ideal Gas Law is frequently used to: (a) convert to moles (b) convert between different temperature scales (c) calculate molar density (d) relate microscopic and macroscopic properties of a gas (e) all of the previous 4. A barge floats due to: (a) Bernoulis principle (b) Archimedes principle (c) Pascals principle (d) in part by each of the above (e) none of the previous 5. What is the difference between heat capacity, C , and specific heat, c ? (a) C depends on objects mass (b) c depends on objects mass (c) Q equation w/ c requires m (d) (a) & (c) (e) none of the above 1 6. Match the following labels to the thermodynamic processes below: (adiabatic, isobaric, isothermal, isochoric, free expansion) V p f 1 f 2 f 3 f 4 700 K 500 K 1 4 i 400 K 2 3 Answer Isothermal Isobaric Ischoric Adiabatic (a) i f 1 i f 2 i f 3 i f 4 (b) i f 2 i f 3 i f 4 i f 1 (c) i f 2 i f 1 i f 4 i f 3 (d) i f 2 i f 1 i f 3 i f 4 (e) i f 3 i f 4 i f 1 i f 2 7. Three Carnot engines operate between reservoir temperatures of: (i) 400 K and 500 K (ii) 600 K and 800 K (iii) 400 K and 600 K Rank the engines according to their thermal efficiences, greatest first: Answer Process (a) (iii) (ii) (i) (b) (i) (iii) (ii) (c) (ii) (i) (iii) (d) (ii) (iii) (i) (e) (iii) (i) (ii) 8. The P in the 4 th equation on the 1 rst line of Chapter 17 refers to: (a) pressure (b) momentum (c) power (d) periodicity (e) none of the previous 2 Name: Date: Phys224 Spring 2010 Dr. P. Hanlet Concept (5 points each) 9. Based on the equation: S = S f S i = nR ln V f V i + nC V ln T f T i why is S a state function?...
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This note was uploaded on 04/28/2010 for the course PHYS 224 taught by Professor Hanlet during the Spring '10 term at Illinois Tech.

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Midterm1Sp10a-s - MidTerm Ia Name: Date: Phys224 Spring...

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