Hat is the quantity of heat required to raise the temperature of of substance A from to at a pressure of 1.0 atm? Substance A has a melting point of 20°C and a heat of fusion of . The boiling point is and the heat of vaporization is at a pressure of 1.0 atm. The specific heats for the solid, liquid, and gaseous phases are 600 J/ (kg • K), 1000 J / (kg • K), and 400 J/(kg • K), respectively.

Acontrol during an experiment. might change remains constant does not exist does change

Why is the melting of ice a physical change ?

The table lists the lattice energies of some compounds.compoundlattice energy (kj/mol)lif            –1,036licl            –853naf            –923kf            –821nacl            –786which statement about crystal lattice energy is  best  supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf.the lattice energy increases as the cations get larger, as shown by lif and licl.the lattice energy decreases as cations get smaller, as shown by nacl and naf.the lattice energy decreases as the cations get smaller, as shown by naf and kf.