Molecular Physics | Thermodynamics Answers

a rigid tank holds 4 kg of water at 20 degree Celcius. If 200 kJ of heat is added to this system, what will be the final temperature? how much work is done in this process

an ideal refrigeration cycle is operating between 120 kPa and 1200 kPa. if R134a is the refrigerant, what is the compression work?

An immersion electric heater was put in some water and raises it's temperature from 40°c to 100°c in 6 minutes. After another 25 minutes it is noticed that half of the water has boiled away. Neglecting heat losses to the surrounding, calculate the specific latent heat of vaporisation of water.

A 25.0L tank contains 2.0kg of neon gas with a pressure of 98.0 atm at 28 degrees celcius. How many kilograms of oxygen can fill the tank under the same pressure and temperature?

determine the sea level specific weight in lbf/cubic feet of liquid of density of 1.75 per cubic feet

a 40 m x 20 m swimming pool is filled with water t a depth of 2.8m, determine the heat in kj required to raise the temperature of the water in the pool from 12degree C to 29 degree C

a fluid has mass of 8kg and occupies a volume of 1.5m^3 the pressure of 101.3 kpa. if the specific internal energy is 1800 kj per kg, determine the total enthalpy in mj

a fluid with a vapor 0.4 pascal and the specific gravity of 14 is used in a barometer. the fluids column height is 0.8m.find the atmospheric pressure in kpa

Assume 2 kg of hydrogen (Item B 28) are initially at 40 atm, 100 K. (a) If the hydrogen changes pressure to 1 atm without a change of temperature, find the changes of enthalpy and entropy. (b) If the hydrogen changes temperature to 35 K with no change of entropy, find the change of pressure and enthalpy.

A football is kicked vertically upward from the ground and a student gazing out of a window sees it coming passed him at 16ft/sec. The window is 30ft above the ground.

a. How high does the ball go above the ground?

b. How long does it take to go from a height of 30ft to the highest point?