A System Had 150 KJ of Work Done on It

question 13

Multiple Choice

A system had 150 kJ of work done on it and its internal energy increased by 60 kJ .
How much energy did the system gain or lose as heat?

• A) The system lost 90 kJ of energy as heat.
• B) The system lost 210 kJ of energy as heat.
• C) The system gained 60 kJ of energy as heat.
• D) The system gained 90 kJ of energy as heat.
• E) The system gained 210 kJ of energy as heat.

---

Definitions:

IR Spectroscopy

A technique used in chemistry to identify molecular structures based on the absorption of infrared radiation, which causes vibrational and rotational transitions in molecules.

IR Absorptions

The process by which molecules absorb specific frequencies of infrared light, causing transitions in their vibrational energy levels, useful for molecular identification.

Structure

Refers to the arrangement of atoms within a molecule, including their spatial orientation and any form of bonding or connectivity between them.

C≡C Stretch

A vibrational motion observed in IR spectroscopy, characteristic of the carbon-carbon triple bond stretching.