Your mug contains 300 ml of coffee at 90 ° C. The coffee is too hot to drink. You decide to cool the coffee by dropping ice cubes at -20 ° C in the coffee. How many grams of ice do you need to add to the coffee to cool it down to 60 ° C?
A)2.00 g of helium gas at 100 ° C and a pressure of 1.00 atm expand in an isobar process so that the volume of the gas doubles. Helium is a monatomic gas with a molar mass of 4.00 g per mole. Find the following: 1.the temperature of the gas after expansion 2. work performed […]