Q2.3 Solar houses are designed to retain the heat absorbed during the day so thatthe stored hear can be released during the night. A botanist produces steam at100 during the day and then allows the steam to cool to 0 °C and freeze duringthe night. How many kilograms of water are needed to store 200 kJ of energyfor the process? (Use the laten heat of vaporization of water L. = 22.6 × 105 3/Kg, the laten heat of fusion of water L₁= 33.5 x 104 J/Kg, and the specific heatcapacity of water c = 4186 J/kg. C. Hint: you need to use both the formula ofthe heat Q = mcVT and Q = mL)

Answered: Image /qna-images/answer/0f09d26e-9ee3-4d4c-ac49-24d88debb30c.jpg

Answered: Q2.3 Solar houses are designed to…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

:the initial quality (x1) is 2 kg of ammonia is contained in a rigid sealed tank at 10 °C. The surroundings temperature is 95 °C. The ammonia is now heated until all ammonia transferred to saturated vapor at 90 °C. Tank Ammonia, 2 kg Ti = 10°C T₂ = 90 c (Sat. Vap.) ₂ Tsum=95 C Below 0.2 O Between 0.2 and 0.4 O Between 0.4 and 0.6 O Between 0.6 and 0.8 O Above 0.8 O
mple 4.1 A stationary mass of gas is compressed without friction from an ini- tial state of 0.3 m' and 0.105 MPa to a final state of 0.15 m and 0.105 MPa, the pres- sure remaining constant during the process. There is a transfer of 37.6 kJ of heat from the gas during the process. How much does the internal energy of the gas change? 3 3
3. Ten Ibm of an ideal gas is compressed in a piston-cylinder arrangement to 1/10 of its initial volume. The ideal gas has a molecular mass (M) of 25 and the ideal gas heat capacity is given by C, = 0.4 + 0.3 x 103 T-0.2 x 106 T² Btu/(lbm °R) where Tis in Rankine. If the initial state 1 is 5 psi and 80° F and the process is polytropic with n=1,3, what is the final (state 2) pressure in psi (8%), the final temperature in °R (8%), the work done in Btu (10%), and the internal energy change (rigorous integration of C. from Tj to T2 is required) (12%), and the heat transfer in Btu (2%) for the process? 人3 13. 1.3 3-R+V B20x (4) 20x0"- 1.3 = 399.1 Psi it
2. a. Take B °C, then convert it to Fahrenheit and Kelvin. b. Find the amount of heat needed to change the temperature of B g of ice from -D °C to B °C. The specific heat of water is 4186 J/kg °C, Latent heat of fusion is 3.33 x105 J/kg, laten heat of vaporization 2.25 x 106 J/ kg. c. A patient of mass B kg is spiking a fever of 105 Fahrenheit. The patient is immersed in ice bath 0°C ice to reduce the fever immediately back down to 98.6 Fahrenheit. How much ice must melt (bath stays at 0°C water) for this temperature reduction to be achieved? Latent heat of fusion is 3.33 x105 J/kg. and Specific heat of body is 3500 J/kg °C. d. A Styrofoam ice box has a total area of C/100 m² and walls with an average thickness of 2.50 cm. The box contains beverages at 0°C. The inside of the box is kept cold by melting ice. How much ice melts in one day if the ice box is kept in the trunk of a car at 35.0°C? Thermal conductivity of ice 0.010 J/s m ºC, Latent heat of fusion is 3.33 x105 J / kg. B:27.0…
Steam generators are a type of heat exchanges that are used in power plants to generate steam at desired pressure and temperature (Fig. Q1.b). In a steam generator, saturated liquid water at 30°C enters a 60-mm diameter tube at the volume flow rate of 12 L/s. After exchanging heat with hot gas, the water changes to steam and leaves the generator at a pressure of 9 MPa and a temperature of 400°C. During this process, the diameter of the water/steam tube does not change.(iii) What is the exit velocity of the steam?
How much energy is required to raise 63 kg of ice at O degrees C to saturated steam at 100 degrees C.Specific heat capacity of water is 4.2 kJ/kg K.Specific latent heat of ice is 335 kJ/kg.Specific latent heat of steam 10 2,257 kJ/kg.
A canister of sevoflurane, an inhaled anesthetic, is warmed to room temperature over the course of 30 minutes. As the gas warms, it pushes on a movable piston with a force of 623 mN, increasing the volume of the gas by 16 cm^3. How much work was done by the gas? A. 0.03 CJ B. 0.27 CJ C. 2.7 CJ D. 270 CJ
0.06m of fluid at 0.6bar is compressed in a polytropic process to a pressure of 3.5bar. The fluid is then heated reversibly at constant volume until the pressure is 3bar, the specific volume is 0.4m/kg. A reversible expansion according to a law pv=c restores the fluid to its initial state. Calculate the net work done on or by the system (in kJ). 01:
In a quasi-static isobaric expansion, 540 J of work are done by the gas. The gas pressure is 0.90 atm and it was originally at 15.0 L. If the internal energy of the gas increased by 70 J in the expansion, how much heat (in J) does the gas absorb?
A piston cylinder arrangement has an initial pressure of 200 kPa and an initial volume of.04 m'. Heat is added into the system until the volume is 4 m' in a such a way that Py1.3 constant describes the relation between pressure and volume during the process. Calculate final pressure inside the cylinder.
An art school specializes in metal sculptures and to save money and space they don't have a metal workshop with traditional power tools and cutting torches. To make the sculptures the students gather scrap metal and use a specialized steamer that heats the already thin metal enough to easily bend and can be used inside around other flammable materials as it is steam powered. The steamer creates the steam and then heats it through a funnel from 100 to 450 °C. Use steam tables to find what the heat input in Watts (W) of the funnel is if a continuous stream of steam at a rate of 50 kg/s undergoes the heating process at a constant pressure. Assumption: We are assuming that the P(bar) of saturation is at 0.1 for our steam tables
2°C 500 //(Kg.°C), is The quantity of heat required to raise the temperature of 500 g of iron by given that the specific heat capacity is 500 kJ 05 kJ 2 KJ O250 KJ

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS