The represented substance has the following heat capacities, enthalpy of fusion, and enthalpy of vaporization.

cp, solid = 3.2 j/(g•°c); cp, liquid = 5.3 j/(g•°c);
cp, vapor = 8.9 j/(g•°c); δhfus = 4.5 kj/mol;
δhvap = 8.6 kj/mol

calculate the total energy input required to accomplish vaporization of one mole of substance at 15°c. the molar mass of the substance is 120.0 g/mol.

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?