19. 4.5 lbm of water at 158 oF is mixed with 8.3 lbm of water at...

19. 4.5 lbm of water at 158 ^oF is mixed with 8.3 lbm of water at 30.9 ^oF. If the specific heat of water is 0.8 BTU/lbm-^oR, find the resulting temperature of the mixture in ^oF.

State your answer to one decimal place. Example: 63.5

20. 2.4 lbm of water at 136 ^oF is mixed with 9.1 lbm of water at 44.9 ^oF. If the specific heat of water is 0.8 BTU/lbm-^oR, find the sum of the change in entropy, in BTU/^oR, for the 2.4 lbm of water and 9.1 lbm of water.

State your answer to four decimal places. Example: 0.6357

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Expert Solution

samet mamat answered 2 years ago

The mass of a high speed train is 4.5×105kg, and it is traveling forward at a velocity of 8.3×101m/s.

The mass of a high speed train is 4.5×105kg, and it is traveling forward at a velocity of 8.3×101m/s. Given that momentum equals mass times velocity, determine the values of m and n when the momentum of the train (in kg⋅m/s) is written in scientific notation.

A piston encloses 1 lbm of water in an initial volume of 0.3 ft^3. The initial...

A piston encloses 1 lbm of water in an initial volume of 0.3 ft^3. The initial temperature is 120F. The piston leaves the stops at a pressure of 150 psia. The water is heated from it's initial state to a final temperature of 400F. a) Draw the process on a P-v diagram with respect to saturation lines. b) Evaluate the work done by the H2O. c) Determine the volume occupied by the liquid at the initial state and when the...

Water is being maintained at 250 psia, and has an internal energy value of 1261 Btu/lbm. The temperature of the water is closest to.

Water is being maintained at 250 psia, and has an internal energy value of 1261 Btu/lbm. The temperature of the water is closest to.A. 789.4 FB. 775.5 FC. 726.9 FD. 704.5 FE. 745.8 FF. 767.1 FG. 734.7 FH. 715.7 F

A stream of saturated water at 54 o C at 25 lbm/min and ammonia solution (50...

A stream of saturated water at 54 o C at 25 lbm/min and ammonia solution (50 wt%) at 150 lbm/min are fed to a boiler at 1 atm. The enthalpy of the ammonia solution relative to the reference conditions is 125 BTU/lbm. The liquid and vapor products are leaving the system. The liquid composition is to be 13 wt% NH3. Determine the rate at which heat must be transferred to the system. Includes diagram, mass balance, energy balance.

50 ml of hot water was mixed with 50ml of cold water in a calorimeter. The...

50 ml of hot water was mixed with 50ml of cold water in a calorimeter. The initial temperature of the cold water is 22°C, the initial temperautre of hot water is 79°C, the average temperature is 50.5°C, the temperature at time 0 is 46.333°C. What is the heat lost by hot water, the heat gained by cold water, the heat gained by calorimeter in J, temperature change of the calorimeter, the heat capacity (C) of the calorimeter in J/°C, and...

Suppose 1.16 kg of water at 11.6 ◦C is mixed with 1.7 kg of water at...

Suppose 1.16 kg of water at 11.6 ◦C is mixed with 1.7 kg of water at 81◦C. After equilibrium is reached, the mixture has an uniform temperature of 52.8517◦C. What is the change in entropy of the system? The specific heat of water is 4186 J/kg · K. Answer in units of J/K.

Water at the rate of 30,000 lbm/h [3.783 kg/s] is heated from 100 to 130◦F [37.78...

Water at the rate of 30,000 lbm/h [3.783 kg/s] is heated from 100 to 130◦F [37.78 to 54.44◦C] in a shell-and-tube heat exchanger. On the shell side one pass is used with water as the heating fluid, 15,000 lbm/h [1.892 kg/s], entering the exchanger at 200◦F [93.33◦C]. The overall heat-transfer coefficient is 250 Btu/h · ft2 · ◦F [1419 W/m2 · ◦C], and the average water velocity in the 34 -in [1.905-cm] diameter tubes is 1.2 ft/s [0.366 m/s]. Because...

A 50.0-g sample of liquid water at 25.0°C is mixed with 35.0 g of water at...

A 50.0-g sample of liquid water at 25.0°C is mixed with 35.0 g of water at 89.0°C. The final temperature of the water is ________°C.

4.5kg of water at 25?C is mixed with 4.5kg of water at 58?C in a well-insulated...

4.5kg of water at 25?C is mixed with 4.5kg of water at 58?C in a well-insulated container.Estimate the net change in entropy of the system.

7.1 g of water ice at 268.4 K is mixed with 234 g of liquid water...

7.1 g of water ice at 268.4 K is mixed with 234 g of liquid water at 304.7 K in an insulated container under an external pressure of 1.00 bar. Answer the following questions assuming that the physical properties of water and ice are constant over the range of interest. Physical properties for water and ice are given below: Cp,m,ice = 1.95 J g-1 K-1 ΔHfusion,ice = 333.4 J g-1 Cp,m,water = 4.18 J g-1 K-1 Melting point of ice:...

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