Answer a & b. i safari File Edit View History Bookmarks Window Help 44%)D Sat 9:

Question

Answer a & b.

i safari File Edit View History Bookmarks Window Help 44%)D Sat 9:22 PM usuO4az.theexpertta.com The Expert TA | Human-like Grading, Autornated! Answer A & B.I Chegg.com l Help PHY-111 Topic 6 Homework Begin Date: 8/28/2017 12:00:00 AM-Due Date: 11/26 2017 11:59:00 PM End Date: 11/29/2017 11:59:00 PM (3%) Problem 33: A certain heat engine does 9.6 kJ of work and 7.5 kJ of heat is transfered to the environment in a cyclical Assignment Status Click here for detailed view 50% Part (a) what was the heat transfer into this engine in kJ? Grade Summary 0% 100% Problem Status tan() | ( Completed 2 Completed 3 Completed Completed 5 Completed 6 Completed 7 Completed 8 Completed 9 Completed 10 Completed 11 Completed 12 Completed 13 Completed 14 Completed 15 Completed 16 Completed 17 Completed cotan0asin acos0 atan acotansinh(. coshO tanhcotanh Attempts remaining: (3% per attempt) detailed view 0 Degrees Radians Submit I give up! Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 1% deduction per feedback 50% Part (b) What was the engine's efficiency in percent? 0.320 25

Explanation / Answer

(a)

Heat transfer into the engine is

Qh = W + Qc = 9.6 + 7.5

Qh = 17.1 KJ

b)

engine efficency

n = W / Qh = 9.6 / 17.1

n = 0.561 = 56.1 %

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