At a pressure of 1 atm the equilibrium melting temperature of Pb is 600 K, and at this temperature the latent heat of melting of Pb is 4810 J/mol. Calculate the entropy produced when 1 mol of supercooled liquid Pb spontaneously freezes at 590 K and 1 atm pressure. At 1 atm pressure: Cp(liquid) = 32.4- (3.1 x 10-3)T J/K Cp(solid) = 23.6+ (9.75 x 10-³)T J/K

A 0.1 kg block of pure copper at a temperature of 250°C is dropped into a 4°C water bath. The bath contains 0.03 m^3 of water and is well insulated. Find the final temperature after the block and the water reach thermal equilibrium. (It is reasonable to assume the following: the specific heat of water is equal to the value at 4°C; the specific heat of the material in the block can be taken to be a constant value evaluated at a temperature mid-way between the initial temperatures of the block and the water.)

The Ostwald process is used commercially to produce nitric acid, which is, in turn, used in many modern chemical processes. In the first step of the Ostwald process, ammonia is reacted with oxygen gas to produce nitric oxide and water. What is the maximum mass of H2OH2O that can be produced by combining 79.3 g79.3 g of each reactant? 4NH3(g)+5O2(g)⟶4NO(g)+6H2O(g)