Edexcel IAL Chemistry A2 12.8 Surroundings and total entropy
Edexcel IAL Chemistry A2 12.8 Surroundings and total entropy
Use ΔSsurroundings = −ΔH/T with T in kelvin and matching joule units, retain the enthalpy sign and then add the system contribution.
How this is tested
- Calculate ΔSsurroundings = −ΔH/T after converting kJ to J and temperature to K.
- Combine system and surroundings values to obtain total entropy with sign and units.
- Rearrange the surroundings equation to calculate enthalpy from entropy and temperature.