QUESTION 1. (20 MARKS).
1.Two moles of an ideal monoatomic gas (CV=20.9JK-1mol-1)are heated from 300K to 350K.The volume of the gas changes from 0.02m3 to 0.2m3.Assuming that the heat capacity remains constant in this temperature change for the system, calculate;
i. Entropy change for the system.
ii. Entropy change for the surroundings.
iii. Entropy change for the universe. (20 marks)
QUESTION FOUR 2.
A)
i. State the first law of thermodynamics.(2 marks)
ii. Explain what heat is and work in thermodynamics.(2marks)
iii. Explain what internal energy for a system is.(2 marks)
iv. Explain the meaning of a thermodynamic system(2marks)
v. What is a state function ?Give an example(2 marks)
B) Calculate the work done when 2 moles of H2 expands.
i. Isothermally against a constant pressure of atm at 250C from 15 liters to 50 liters.(5 marks)
ii. The gas expands isothermally and reversibly.(5 marks)
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With summer break fast approaching, graphic design students like me are trying to figure out productive ways to spend their time. Work for money? Work for experience? Summer classes?
I’ve spent the past few months doing everything I can to
find an internship this summer. Finding a company that isn’t an MLM and will
actually pay good money for your design work is tough. Luckily, graphic design
is a field that’s in demand, so there are a lot of good options out there.
The other option for getting design experience during the summer
break is freelance work, but that comes with its own slew of issues. There’s
nothing worse than beginning to work with a client and getting excited for a
project just for them to look at you with a face like the Surprised Pikachu Meme
when you start to discuss cost.
With two weeks left in the semester, here’s hoping we figure
something out soon!