The chemical equation needs to be balanced so that it follows the law of conservation of mass.
D ) 0.30 atm, you just subtract 1.5 with 1.2 I forgot what the law was called
The enthalpy of vaporization of H2O is higher than the enthalpy of fusion of H2O, therefore vaporizing the same mass of H2O would require more heat/energy than melting the same mass of H2O.
A mixture consists of numerous substances, whereas a substance does not consist of mixtures, but rather of compounds. Mixtures can be separated physically, while substances cannot.
