A 100-ML Sample of Water Is Placed in a Coffee

question 6

Multiple Choice

A 100-mL sample of water is placed in a coffee cup calorimeter. When 1.0 g of an ionic solid is added, the temperature decreases from 21.5°C to 20.8°C as the solid dissolves. Which of the following is true for the dissolving of the solid?

• A) ΔH < 0
• B) ΔS_sys< 0
• C) ΔS_univ > 0
• D) ΔS_surr > 0
• E) none of these

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Definitions:

Anterior Cingulate Cortex

A part of the brain located in the frontal lobe that plays a crucial role in emotion formation and processing, decision making, empathy, impulse control, and focusing attention.

Amygdala

A part of the brain's limbic system involved in emotion regulation, especially fear and pleasure responses.

Occipital Lobe

The area of the brain situated at the rear of the skull, tasked with interpreting visual data.

Sympathetic Nervous System

Part of the autonomic nervous system responsible for the body's 'fight or flight' response by activating physiological changes.