Calculate the Change in Internal Energy (ΔU) for a System

question 12

Multiple Choice

Calculate the change in internal energy (ΔU) for a system that is giving off 25.0 kJ of heat and is changing from 12.00 L to 6.00 L in volume at 1.50 bar. (Remember that 100 J = 1 L bar)

• A) +25.9 kJ
• B) -16.0 kJ
• C) -25.9 kJ
• D) -24.1 kJ
• E) 937 kJ

---

Definitions:

Desert Preserve

An area designated for the protection of the unique ecosystems and biodiversity found in desert environments.

Cactus Wren

The largest North American wren, characterized by its distinctive white and black plumage and adaptation to desert life.

Multicellular Eukaryotes

Organisms made up of multiple cells with complex structures including a membrane-bound nucleus, found in domains such as plants, animals, and fungi.

Photosynthetic Producers

Organisms that convert light energy into chemical energy through photosynthesis, providing the base for most of Earth's food chains.