Estimate the change in entropy when one mole of nitrogen is compressed by a piston in a cylinder from 300 K and 23 liters/mol to 400 K and 460 liters/mol. Steam at 400C and 10 bar is left in an insulated 10 m3 cylinder. The cylinder has a small leak, however. Compute the conditions of the steam after the pressure has dropped to 1 bar. What is the change in the specific entropy of the steam in the cylinder? Is this a reversible process? The mass of the cylinder is 600 kg, and its heat capacity is 0.1 cal/g-K. Solve the problem with and without considering the heat capacity of the cylinder.
Using appropriate examples identify and discuss the key steps involved in project implementation. a) Briefly discuss four factors to consider when writing a problem statement of a development project proposal. b) Explain the significance of the following techniques to collection of project evaluation data. i) Community meetings ii) Critical incident analysis iii) Focus group discussions
February 4, 2016
4:22 pm
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