# First law of thermodynamics

> The first law of thermodynamics is essentially a statement of the conservation of energy applied to thermodynamic systems. It tells us how the internal energy of a system changes when heat is added…

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## Full notes

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## More in Thermodynamics

- [Thermodynamic systems and variables](https://www.hlayiso.com/grade-11/technical-sciences/notes/thermodynamics/thermodynamic-systems-and-variables) — Previous section
- [Heat engines, efficiency and refrigerators](https://www.hlayiso.com/grade-11/technical-sciences/notes/thermodynamics/heat-engines-efficiency-and-refrigerators) — Next section
- [All Thermodynamics sections](https://www.hlayiso.com/grade-11/technical-sciences/notes/thermodynamics)

## Frequently asked questions

### What will I learn in "First law of thermodynamics"?

This section covers First law of thermodynamics as part of Thermodynamics in Grade 11 Technical Sciences. You'll find clear explanations, worked examples, and key definitions aligned to the CAPS curriculum.

### Is this section aligned with the CAPS curriculum?

Yes. All notes on Hlayiso, including "First law of thermodynamics", are written against the official CAPS curriculum and ATP for Grade 11 Technical Sciences.

### What should I study after "First law of thermodynamics"?

Continue with the next section in Thermodynamics, or test your understanding with the interactive quiz linked to this section.

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