| Clue | Source | Date |
|---|---|---|
| Certain amount of energy? Then play around (8) | The Guardian Cryptic | 13 Feb 2025 |
| Thermodynamic property of a system equal to the sum of its internal energy and the product of its pressure and volume (8) | ||
| Thermodynamic quantity | The Times Concise | 23 Mar 2021 |
| Heat content of the pan, largely empty, sadly | ||
| Total heat of a thermodynamic system | Newsday | 11 Feb 2017 |
| Measure of energy they plan to be manufactured | ||
| It's symbolized by an H |