A mixture of ice and water in thermal balance it contains 20 liters water and 15 kg of ice. The system is heated up to give 2230 Kcals. Known that the heat of fusion of the ice is of 79,60 Kcal /Kg. Calculate the total variation of entropy of the system and how much heat should be given for getting a variation of entropy equal to 4,5 Kcal/Kelvin.
2007-02-08 05:11:02 · 1 answers · asked by alinez76 2 in Science & Mathematics ➔ Physics
This homework looks reasonably easy (assuming you bothered to attend the classes, take notes and/or read the books).
Of course it could be you just don't understand, so I'll give you a few clues.
When you put energy (2230 Kcals) into a mixed ice/water system, the energy will first go into melting the ice.
Since you know the heat of fusion of ice (79,60 Kcal /Kg) you know that 15kg of Ice must be melted into water before the system will start to heat up.
The rest of your question doesn't make much sense = I assume you took it down incorrectly in class.
2007-02-09 09:59:55 · answer #1 · answered by Steve B 7 · 0⤊ 0⤋