A pressure cooker containing some water with an internal energy of 300 kJ is heated by a gas burner. 0.5 kg of steam with an enthalpy of 1800 kJ/kg escapes through the safety valve. The heat loss through the wall of the cooker is 250 kJ. If the final internal energy of the water and steam in the cooker is 500 BTU. Find the heat supplied to the coo

A pressure cooker containing some water with an internal energy of 300 kJ is heated by a gas burner. 0.5 kg of steam with an enthalpy of 1800 kJ/kg escapes through the safety valve. The heat loss through the wall of the cooker is 250 kJ. If the final internal energy of the water and steam in the cooker is 500 BTU. Find the heat supplied to the coo

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 27RQ: How many Btu/h would be produced in a 12-kW electricheater?

See similar textbooks

Similar questions

A pressure cooker containing some water with an internal energy of 300 KJ isheated by a gas burner. 0.5 kg of steam with an enthalpy 1800 KJ/kg escapesthrough the safety valve. The average velocity of the steam is 5 m/s. The heat loss through the wall of the cooker is 250 KJ. If the final internal energy of the water and steam in the cooker is 500 KJ, find the heat supplied to the cooker.
In a steam engine cylinder 0.15 kg of steam at 10 bar and 250 0C expands to a pressure of 1 bar. If the quality of the steam at the end of expansion is 0.8, find the work output from the cylinder. Assume that the engine is well insulated.
In a cylinder, the heat rejected is 32 kJ while the decrease in internal energy of the gas is 92 kJ. What is the work in kJ?
In a hot water heating system, water heated to 95°C and then is pumped at the rate of 4 L/min through a radiator where it is cooled to 35°C. If the water arrives at the radiator at a temperature of 85°C, how much heat in kJ does the radiator release each hour?
(i) A can of soft drink at room temperature is put into the refrigerator so that it will cool. Would you model the can of soft drink as a closed system or as an open system? (ii) A candle is burning in a well-insulated room. Taking the room (the air plus the candle) as the system, determine if there is any heat transfer during the burning process. Explain how?
In a thermodynamic process, pressure of a fixed mass of gas is changed in such a manner that the gas releases 20 joule of heat and 8 joule of work was done on the gas. If the initial internal energy of the gas was 30 joule, then the final internal energy will be:
In a commercial water heater, 80 L/min of water is heated from 20° C to 60° C . Calculate the amount of energy required per hour.
1 kg of ice from a freezer at -10◦C is placed in a bucket in the garden where the temperature is 20◦C. The temperature difference between the garden and the ice/water system is used to operate an engine. Calculate the maximum amount of work that can be done by this engine and its overall efficiency.
A battery is well insulated while being charged by 12.3 V at a current of 6 A. Take the battery as a control mass and find the instantaneous rate of work and the total work done over 6 h.
A pressure cooker containing some water with an internal energy of 300 kJ is heated by a gas burner. 0.5 kg of steam with an enthalpy of 1800 kJ/kg escapes through the safety valve. The average velocity of steam is 5 m/s. The heat loss through the wall of the cooker is 250 kJ. If the internal energy of the water and steam in the cooker is 500 kJ. Find the heat supplied to the cooker. Provide complete solution, with diagram
Air flows steadily through an engine at constant temperature 400 K.Find the work per kilogram if the exit pressure is one third the inlet pressure and the inlet pressure is 207 KPa. Assume that the kinetic energy and potential energy variation is negligible.
In the interior of a piston that can move freely, there is initially 2 kg of R-134a refrigerant in the form of a saturated liquid at -10 C. This container has an electrical resistance to which 10 Volts are applied and by the passing 2 amps. Find the time required for the refrigerant to completely convert to saturated vapor.