4. [30 pts] 20 liters of water at 20 bar and 100 °C are in a...

4. [30 pts] 20 liters of water at 20 bar and 100 °C are in a variable volume container. 56,000 kJ of
heat are added to the system at constant pressure which causes an increase in both temperature
and volume.
a. [4 pts] Draw a schematic of the process

b. [4 pts] Write the energy balance for this process and clearly state any assumptions:

c. [12 pts] What is the final volume of the container?

d. [8 pts] How much work in [kJ] is completed? Pay careful attention to your negative signs!

e. [2 pts] In one sentence explain your answer from Part D in the context of the process described in
the problem statement and the heat that is added to the system.

Expert Solution

Amanda K answered 1 year ago

20 liters of water at 20 bar and 100 °C are in a variable volume container....

20 liters of water at 20 bar and 100 °C are in a variable volume container. 56,000 kJ of heat are added to the system at constant pressure which causes an increase in both temperature and volume. Draw a schematic of the process Write the energy balance for this process and clearly state any assumptions: What is the final volume of the container? How much work in [kJ] is completed? Pay careful attention to your negative signs! In one sentence...

1. Two liters of methanol at -30 ˚C and two liters of water at 25 ˚C...

1. Two liters of methanol at -30 ˚C and two liters of water at 25 ˚C are mixed in an insulated glass cylinder that has a mass of 2 kg. The heat capacity of glass is 0.9 kJ/kgK.Using the properties of the other substance in the appendix of the book, determine thefinal temperature of the mixture. at room temp

100 g of ice at -20°C are mixed with 250 g of water at 20°C in...

100 g of ice at -20°C are mixed with 250 g of water at 20°C in an insulated calorimeter. What is the final temperature of the system? How many grams of liquid water and how many grams of ice will you find after the system equilibrates? find T in degrees C; m of solid (in grams); m of liquid (in grams) T=____ ms=____ mliq=____

Q3. 5 kg of water at T = 20° C and P = 7 bar is...

Q3. 5 kg of water at T = 20° C and P = 7 bar is isobarically heated such that ΔU = 5000 kJ. (i) Find the initial and final volumes (in m3 ). (ii) Find Q and W (in kJ). (iii) Show the initial and final states on p-υ and T-υ diagrams (not to scale), denoting by arrows the direction of the process. Label the ‘f’ (saturated liquid) and ‘g’ (saturated vapor) points. Also, indicate the values of υf...

Thermodynamics - water P = 20 bar, T = 250 C, what is the specific volume?...

Thermodynamics - water P = 20 bar, T = 250 C, what is the specific volume? (choose the closest answer) a)0.1085 b)0.15 c)0.1200 d)0.1308 T = 240 C, P = 2.5 bar, what is the specific internal energy?. a)2713.1 b)2714 c)2717.2 d)2720 P = 20 bar, h = 2900 kJ/kg, what is the temperature? a)250 b)240 c)280 d)300

Refrigerant 134a enters an air conditioner compressor at 4 bar, 20°C, and is compressed at steady...

Refrigerant 134a enters an air conditioner compressor at 4 bar, 20°C, and is compressed at steady state to 12 bar, 80°C. The volumetric flow rate of the refrigerant entering is 7.5 m3/min. The work input to the compressor is 112.5 kJ per kg of refrigerant flowing. Neglecting kinetic and potential energy effects, determine the magnitude of the heat transfer rate from the compressor, in kW.

Recall that at 4°C, water has a density of 1.0000 g cm-3. However, at 20°C, water has...

Recall that at 4°C, water has a density of 1.0000 g cm-3. However, at 20°C, water has a density of 0.9982 g cm-3. A student is using a balance to determine the difference between the amount of water transferred using a volume from a 10 mL volumetric pipette compared to a 10 mL in a 50 mL graduated cylinder. To do this, the student measures the mass of a beaker and then adds water from the volumetric pipette. The student records both measurements...

Consider a solution of 1.00 g of glucose in 100 g of water at 20˚C (where...

Consider a solution of 1.00 g of glucose in 100 g of water at 20˚C (where the vapor pressure of pure water is 17.54 torr). For this problem we will assume the solution behaves ideally. (a) What is the equilibrium vapor pressure of the solution? (b) What is the osmotic pressure of the solution versus pure water (report it in torr)? (c) What is the activity of water as a solvent in the solution? (d) Now suppose 1.00 g of...

How many liters of 20% alcohol solution should be added to 40 liters of a 50% alcohol solution to make a 30% solution?

ask 1. In a 6kW boiler, 100 liters of water is heated. Measurements have shown that...

ask 1. In a 6kW boiler, 100 liters of water is heated. Measurements have shown that the water temperature has increased by 20 degrees Celsius within one hour. What is the usefulness of a boiler? Solution: eta=78% Task2. Immerse the electric heater in water of mass 5kg and temperature 15 degrees and connect it to a voltage of 220V. The heater is flowing with a current of 2A. What will be the temperature of the water after 15 minutes if...

Question