Molar Heat of Fusion, Vaporization & Sublimation Explained (Phase Diagram) by Amjad Ali

In this lecture, we break down the energy changes that occur during phase transitions in matter. You will learn what molar heat of fusion, molar heat of vaporization, and molar heat of sublimation mean, how each is calculated, and why these energy values differ between substances. We also explain the phase change diagram in detail, showing how temperature and energy relate as a substance moves between solid, liquid, and gas states, including the flat regions that represent melting and boiling points. This topic is essential for FSc Chemistry, NMDCAT, ECAT, and ETEA preparation, and is explained in a simple, exam-focused manner with clear examples and diagrams. By the end of this video, you will be able to solve numerical problems related to heat of fusion, heat of vaporization, and phase change energy calculations with confidence. Subscribe to PureChem Concept (Chemistry with Amjad Ali) for more FSc Chemistry lectures, solved papers, and MCQ practice sessions designed for BISE Malakand and other Pakistani boards. #Chemistry #FScChemistry #MolarHeatOfFusion #HeatOfVaporization #PhaseChangeDiagram #NMDCAT #ECAT #ETEA #PureChemConcept #ChemistryWithAmjadAli Keywords/Tags: molar heat of fusion, molar heat of vaporization, molar heat of sublimation, phase change diagram, energy of phase change, heat of fusion formula, heat of vaporization explained, phase diagram chemistry, FSc chemistry phase change, states of matter energy, enthalpy of fusion, enthalpy of vaporization, sublimation energy, melting point boiling point energy, NMDCAT chemistry, ECAT chemistry preparation, ETEA chemistry, FSc 1st year chemistry, physical chemistry lecture, PureChem Concept, Chemistry with Amjad Ali, phase transition energy diagram, calorimetry chemistry, thermochemistry FSc1st year chemistry+2nd year chemistry regular lecture. student able to easily attempt entry test Mcq of NMDCAT,NUMS,NAT,NTS,