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Evaluate the dimensionless groups
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- Professional divers sometimes use heliox, consisting of 79% helium and 21% oxygen by mole. Suppose a perfectly rigid scuba tank with a volume of 11.0 L contains heliox at an absolute pressure of 2.20 x 107 Pa at a temperature of 30.0°C. (a) How many moles of helium and how many moles of oxygen are in the tank? 75.9 mol mol helium noxygen + 20.2 (b) The diver goes down to a point where the sea temperature is 26.0°C while using a negligible amount of the mixture. As the gas in the tank reaches this new temperature, how much heat is removed from it (in kJ)? 5.5e+03 X kJarrow_forwardI need step by step explanation. Please explain clearlyarrow_forwardDetermine the pressure of Gas 2. Follow the statement and the figure below. Apply Knowledge about Fluid Mechanics to solve the question.arrow_forward
- 2. For a certain gas, R = 0.377KJ/kg.K and k = 1.384. (a)What are the values of c, and a, ? (b) What mass of this gas would occupy a volume of 0.552 m at 517.11 kPa and 36.7 deg. Celsius? (c) If 31.65 kJ is transferred to this gas at constant volume, what are the resulting temperature and pressure? Use 2kgmarrow_forwardFor a certain polyatomic ideal gas the value R is 0.354 kJ/(kg.K). Determine its molecular weight ( W ), both specific heat at constant pressure ( Cp ) and at constant volume ( Cy ).arrow_forwardQ2. Consider a piston-cylinder device that contains liquid water at 1 MPa and 150 °C. The weights on top of the piston are removed one by one so that the pressure inside the cylinder decreases gradually (Fig. 3–18). Draw a property diagram that shows all the water states including phase change processes, which will go from compressed liquid to super-heated vapor while keeping the temperature constant in the system. P = 1 MPa T = 150°C Heatarrow_forward
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