Molecular Physics | Thermodynamics Answers

the gain of entropy is 7.24kcal/kg when 5kg of water at 100°c is converted to steam at same temperature. find quantity of heat absorbed

explain in terms of molecules ,how the are inside the cylinder exerts a pressure

A 5hp fan is used in a large room to provide for air circulation. Assuming a well insulated sealed room.determine the increase in internal energy after 1 hour of operation

1. 500 mL C2H6 was measured at STP, Determine how many grams of C2H6 were measured.

2. The mass percentage composition of sodium metal in 58.44 g NaCl is about 39.34%, Determine the percentage composition of sodium in 1000 g of NaCl.

1. The density of water is 1.00 g/ML at 4 degrees Celsius. How many water molecules are present in 2.56 mL at this temperature?

2. For a 4.35 g sample of ammonia gas (NH3), Determine:

(a) Number of ammonia molecules.
(b) Total number of atoms in a sample.
(c) Volume of the gas at room temperature of 25 degrees Celsius and a pressure of 1 atm.

1 kg of gas is contained in a Piston-cylinder assembly at 10 bar. The gas is allowed to expand reversibly until volume becomes twice the initial value, by following PV2 = C. The gas is then cooled at constant pressure until the piston reaches to its original position. Finally heat is supplied to the fluid reversibly, with piston firmly locked, and due to which the fluid pressure rises to its initial value of 10 bar. If fluid has an initial volume of 0.05 m3. Determine the net work done.

A gas enclosed in a cylinder-piston arrangement is heated slowly to change its state from 100 kPa, 0.03 m3 to an initial state of 0.1 m3. Assuming volume of the gas changes inversely with pressure, determine amount of work done during the process.