1. The pressure in the substance drastically decrease from 354 to 21 POUNDS PER SQUARE INCHES (PSI), the heat energy of the open system reduces 555BTU/LB, and the volume increases from 1 to 10FT^3/LB. a.) Determine the work per LB. Units:BTU/LB b.) Determine the work in HP (Horse Power) for 10LB per min. (1HP = 42.4BTU/MIN) Units: HP

1. The pressure in the substance drastically decrease from 354 to 21 POUNDS PER SQUARE INCHES (PSI), the heat energy of the open system reduces 555BTU/LB, and the volume increases from 1 to 10FT^3/LB. a.) Determine the work per LB. Units:BTU/LB b.) Determine the work in HP (Horse Power) for 10LB per min. (1HP = 42.4BTU/MIN) Units: HP

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 29RQ: If 3000 ft3 of air is crossing an evaporator coil and iscooled from 75F to 55F, what would be the...

See similar textbooks

Similar questions

If 3000 ft3 of air is crossing an evaporator coil and iscooled from 75F to 55F, what would be the volume of air, in ft3, exiting the evaporator coil?
How many Btu of heat can be produced by 4 kWh ofelectricity?
Matter is a substance that occupies space and has A. color. B. texture. C. temperature. D. mass.
Four pounds of a gas occupy 10 ft3. What would be itsdensity and specific gravity?
assume SI units, & 1 atm = 105 Pa; ρwater = 1000 kg/m3; ρair = 1.2 kg/m3; g = 9.8 m/s2
Unreasonable Results - A slightly deranged Arctic inventor surrounded by ice thinks it would be much less mechanically complex to cool a car engine by melting ice on it than by having a water-cooled system with a radiator, water pump, antifreeze, and so on. (a) If 80% of the energy in 1.00 gal of gasoline is converted into “waste heat” in a car engine, how many kilograms of 0C ice could it melt? (b) Is this a reasonable amount of ice to carry around to cool the engine for 1.00 gal of gasoline consumption? (c) What premises or assumptions are unreasonable?
Question # 2 A gas of mass (4)kg undergoes a quasi-static expansion which follows a relationship p = a+bv, where ‘a’ and b are constants. The initial and final pressures are (1017) kpa and (217) kpa respectively and corresponding volumes are 0.2meter cubic and 1.2meter cubic. The specific internal energy of the gas is given by u=1.5 pv -85kJ/kg, where ‘p’is in kpa and ‘v’is in m3/kg. Describe the process involved in given system and calculate the net heat transfer and the maximum internal energy of the gas during expansion. (m3 means metercubic).
(d) The rate of heat generated, Btu/min
Four kilogram of certain gas is contained within the piston- cylinder assembly. The gas undergoes a process for which the pressure-volume relationship is PV^1.5 = C. The initial pressure is 3 bars, the initial volume is 0.1 m^3 and the final volume is 0.2 m^3. The change in internal energy is – 4.6 ??/??. Determine the heat transfer for the process in KJ.
Question #1 a) The absolute pressure inside a tank is 0.13bar, and the surrounding atmospheric pressure is 98 kPa. A Bourdon gage is mounted in the tank wall to measure the pressure, in kPa? Is this a vacuum or gage reading? b) (967)kJ of heat is transferred from the system to the surroundings when a closed system of mass (28)kg undergoes a process. During the process, 200kJ work is done on the system. If the initial specific internal energy of the system is 300 kJ/kg, Describe the process and determine the final specific internal energy, in kJ/kg? Neglect changes in kinetic and potential energy.
Specific Gravity of Water=1.0 SG of Mercury= 13.6 SG of n-Octane=0.655
Heat transfer occurs whenever there is a ____ difference between two substances. a) volume b) pressure c) heat capacity d) temperature