Which of the following terms refers to the amount of heat needed to change 1 kg of a substance from a liquid to a gas at its boiling point?
a. specific heat capacity
b. specific heat of phase changes
c. latent heat of fusion
d. latent heat of vaporization

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell