Molecular Physics | Thermodynamics Answers

Carbon dioxide flows steadily at 1 kg/s through a device where the pressure, specific volume, and velocity of the gas are tripled according pVn = C. The inlet conditions are p1 = 200 kPa, v1 = 0.4 m3/kg, and v1 = 100 m/s. Determine (a) n; (b) the initial and final temperatures; (c) the change of enthalpy; (d) the power; (e) the heat.

Two thermometers in degrees Celsius and degrees Fahrenheit are both immersed in a fluid. If the reading in degrees Fahrenheit is thrice that of the degrees Celsius reading, what is the equivalent reading in degrees Rankine?

John decides to lose weight by eating only cold food. A 200 grams mango

pudding yields about 375 kcal of energy when eaten. If its specific heat is 0.5

kcal / kg. ℃, how much greater is its energy content at 60 ℃ than 30 ℃ ?

A centrifugal pump operating under steady flow conditions delivers 2, 270 kgm/min of water

from an initial pressure of 82, 740 Pa to a final pressure of 275, 800 Pa. The diameter of the inlet

pipe to the pump is 15.24 cm and the diameter of the discharge pipe is 10.16 cm. Determine the

work. Is it done on or done by the system?

Gold has a face centered cubic unit cell and has the density 𝟏𝟗. 𝟑 𝒈 𝒄𝒎−𝟑. Calculate the

length along an edge. (𝐴𝑢 = 197 𝑔 𝑚𝑜𝑙−1)

a centrifugal pump operating under steady flow conditions delivers, 3,050 kg/min of water from initial pressure of 83, 400 Pa to final pressure of 300,000 Pa. the diameter of the inlet pipe to the pump is 16cm and the diameter of discharge pipe is 10.16cm. what is the work

 The height of a cylindrical tank, containing 15 lb of gas at 70 psia and 115 Farenheit, IS TRIPLE ITS DIAMETER; the gas constant is R = 45 ft lbf/lbm R. find.

a) the tankdiameter in ft.

b)the tank height in ft.

5 cubic meter tank contains chlorine at 250 kPa and 30 degrees Celsius after 2.5 kg of chlorine has been used.

Determine: 

(a) the original mass of chlorine in the tank in kg

(b) the pressure (kPa) of chlorine in the tank if the original temperature was 315K

A reservoir contains 2.83 cubic meter of CO at 6895 kPa and 23.6 degrees C. A cylindrical tank with h=1.5D is filled from the reservoir to a pressure of 3697 kPa and a pressure of 3697 kPa and a temperature of 15.4 degrees C, while the pressure and temperature in the reservoir decreases to 6205 kPa and 18.3 degrees C respectively.a) the total mass of CO transferred to the tank in kg, b) the total volume of the tank in cubic meter, c) the diameter of the tank in mm

Eight boys are equally spaced about a pushball and each exerts a force upon it toward the center, as shown. Each boy in position 1, 3, and 7 exerts a force of 70 N, and the rest of the boys exert 50 N each. What force is needed to keep the ball at rest? *