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: 

e.) Determine the entropy generated by this process (J/K).

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

Based on the federal standard, a driver is legally drunk if their blood-alcohol concentration (BAC) is measured at which minimum level?

Yasmin is chewing nicotine gum and occasionally applies a nicotine patch. Which smoking cessation therapy is she using?

Which substance is the component of cigarette smoke that interferes with hemoglobin’s ability to carry oxygen in the blood?

Which substance is especially toxic to fetuses, babies, and children, affecting every organ system, including the developing brain, with a lifelong impact on IQ, learning, focus, and behavior?

What is the first step in creating or fulfilling occupational wellness?

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?

The hormone insulin acts like a key, letting which substance into cells and providing energy?