Based on Student I's eKpldlldlion, why did the volume of thc liquid dccrcase ovcr the first 12 min of heating. Heat caused a liquid to be converted to a gas. Siudenl I The beaker initially contained a solution made by dis- solving a white solid in a pure, green solvent. Over the first 12 min, Ihe solvent evaporated, causing the concentration of the dissolved solid to increase. At 12 min, the volume of solvent had d¢cre<lSed to a point at which the solid was no longer soluble. so it started to exit the solution, At 16 min, all of the solvent had evaporated,
