These Thermodynamics Class 11 Chemistry notes bring the main relationships into one short revision checklist.

Key relationships

  • First law: ΔU = q + w, using the chemistry sign convention.
  • Expansion work: w = −PₑₓₜΔV for the stated constant external-pressure case.
  • Enthalpy: H = U + PV; at constant pressure, heat equals ΔH under the appropriate work assumptions.
  • Gibbs energy: ΔG = ΔH − TΔS at a stated temperature; use kelvin and compatible energy units.

At constant temperature and pressure, negative ΔG indicates thermodynamic favourability, not the speed of a reaction.

Before a numerical question

  • Identify the system and what changes.
  • Mark the sign of heat and work.
  • Convert units and write the relationship before calculation.

Practise a calculation and a conceptual explanation in the same session to test both skills.

Newsletter & attachments

FirstHope Thermodynamics Class 11 Chemistry Notes PDF: Quick Revision cover with a distinct creative study scene and large readable text.
class11-thermodynamics.webp

Check the original source

CBSE Academic curriculum and FirstHope study resources

Open official source