1.

Objects A and B have the same mass of 4.2 kg and are at their melting points. They melt when 3.2 x 104J of heat is added to A and when 11 x 10# J is added to B. (a), (b) Determine the latent heat of fusion for the substance from which each object is made. (c) Find the heat required to melt object A when its mass is 8.4 kg.A mass m = 0.051 kg of benzene vapor {L1, = 3.94x105 J/kg} at its boiling point of 301C is to be condensed by mixing with water at 30.0\"C. What is the minimum mass. of water required to condense all of the benzene vapor? Assu me the mixing and condensation take place i5 a perfectly insulating container