The internal energy of a system can be changed by work and by:

Question

Accepted Answer

A. Heat flow

1. Work can be done on or by the system.
2. Energy can also cross as thermal transfer.
3. So heat flow is the other route.
_Source: OpenStax Chemistry 2e, Chapter 5, Thermochemistry._

Answer

Head count

Answer

Hand signs

Answer

Heap size

The internal energy of a system can be changed by work and by:

Keep practising Thermochemistry