How long would it take for 1.50 molmol of water at 100.0 ∘C∘C to be converted completely into steam if heat were added at a constant rate of 20.0 J/sJ/s ?

A 36.52 g36.52 g sample of a substance is initially at 21.6 °C.21.6 °C. After absorbing 1505 J1505 J of heat, the temperature of the substance is 197.6 °C.197.6 °C. What is the specific heat (?c) of the substance?

How much heat is required to convert 58.2g of liquid water at 15 °C to water vapor at 125 °C. (Use the constants given in the example above.) kJ

Consider an unknown metal X with a mass of 67.5 g at an initial temperature of 76.1 °C. The metal is placed in 88.7 g of water initially at 20.5 °C in an insulated container. The final equilibrium temperature of the system is 32.1 °C. Calculate the specific heat (J/(g·°C)) of the metal X.   Use Cs = 4.18 J/(g·°C) for the specific heat of water. Assume that the only energy exchange that occurs is between the metal and the water.