# Question: At a pressure of 1 atm liquid helium boils at 4 20 K

At a pressure of 1 atm, liquid helium boils at 4.20 K. The latent heat of vaporization is 20.5 kJ/kg. Determine the entropy change (per kilogram) of the helium resulting from vaporization

## Answer to relevant Questions

Calculate the change in entropy of 250 g of water heated slowly from 20.0°C to 80.0°C. (Suggestion: Note that dQ = mc dT)A 1.00-kg iron horseshoe is taken from a forge at 900°C and dropped into 4.00 kg of water at 10.0°C. Assuming that no energy is lost by heat to the surroundings, determine the total entropy change of the ...If you toss two dice, what is the total number of ways in which you can obtain (a) a 12 and (b) a 7?In 1816 Robert Stirling, a Scottish clergyman, patented the Stirling engine, which has found a wide variety of applications ever since. Fuel is burned externally to warm one of the engine’s two cylinders. A fixed quantity ...A sample consisting of n mol of an ideal gas undergoes a reversible isobaric expansion from volume Vi to volume 3Vi. Find the change in entropy of the gas by calculatingPost your question