UNIT 08 : THERMOCHEMISTRY AND ENERGETICS OF CHEMICAL REACTION

Thermochemistry is a foundational chapter in MDCAT Chemistry, sitting within the 25% Chemistry allocation of your 45-question paper.

What this chapter covers:

• Define Thermodynamics
• Classify reactions as exothermic and endothermic
• Define the terms system, surrounding, boundary, state function, heat, heat capacity, internal energy, work done and enthalpy of a substance
• Name and define the units of the Internal energy
• Explain the first law of thermodynamics of energy conservation
• Apply Hess’s Law to construct simple energy cycles
• Describe enthalpy of the reaction

This chapter blends core definitions and terminology with genuine numerical work, from first law calculations and pressure-volume work to Hess’s Law energy cycles and Born-Haber cycle problems, placing it across the moderate range with pockets of difficult, multi-step numericals.

Mastery here means being equally comfortable defining terms precisely and manipulating enthalpy equations algebraically, since MDCAT tests both within the same chapter.

Why this practice set helps:

• Covers every subtopic the PMDC curriculum identifies, plus the supporting concepts textbooks present alongside them
• Every question includes a full explanation of why the correct answer is right and why each other option is wrong
• Built to help you learn faster than passive reading, with nothing the exam may draw from left untouched

Work through this set attentively, and you build both the precise terminology and the calculation confidence this chapter demands