b.) Determine the number of kmols of helium that enters the tank (kmol).

Problem 3 (35 pts) A rigid, adiabatic tank with volume 2 m3 is initially filled with pure hydrogen at a temperature of 300 K and a pressure of 500 kPa.  The tank is connected through a valve to a source of pure helium that is at a temperature of 500 K and a pressure of 3000 kPa.  The valve is opened and 2 kg of helium is allowed to enter the tank. Model the hydrogen and helium as ideal gases with constant specific heat capacities.  The molar heat capacities, molar masses and the universal gas constant are listed below.  The ideal gas entropy relations are attached to the end of this exam.   Helium Hydrogen molar cP 20786 J/kmol-K 28528 J/kmol-K molar cv 12472 J/kmol-K 20214 J/kmol-K MW 4.003 kg/kmol 2.016 kg/kmol Runiv 8314.3 J/kmol-K   a.) Determine the mass and number of kmols of hydrogen initially in the tank (kg and kmol). Number of kmoles: 

Humidity ratio:

e.) What is the rate of entropy generation associated with the condenser (kW/W)?

Charlie sometimes can’t remember where he left his phone or whether he turned off the oven. This is best described as a sign of which health alteration?

As we age, it is good to know that reading, playing games, and working crossword puzzles help maintain which function?

Jasmine dislikes going to the theater, but her partner, Cecelia, loves it. Cecelia tries to convince Jasmine to like the theater by saying “It’s the best thing ever, you will love it!” According to Social Judgement Theory, this message is likely to 

To maximize the value of your individual retirement account (IRA), starting to save sooner will always be better than later because of the impact of which factor?

Brian tries to always purchase products packaged in reused materials. Brian has chosen which path toward sustainability?

Why should you keep track of your credit card purchases?