Practice Test

Question 9 • Physical Science

Ricardo finds an online site about the gas laws. The site shows the equation for Charles’s law. cap v sub 1 cap t sub 1 is equal to cap v sub 2 cap t sub 2 What change would correct the error on the site?

Answer

The symbol for cap t sub 2 should be smaller than for cap t sub 1 because if volume increases, then temperature should decrease.

The volume should be divided by temperature on each side of the equation.

Each cap t should be replaced by a cap p in the equation because Charles’s law describes changes in volume and pressure.

“Charles’s law” should read “Gay-Lussac’s law,” which explains changes in volume and temperature.

Explanation

Charles’s law relates volume and absolute temperature at constant pressure: V₁/T₁ = V₂/T₂. The site’s equation multiplies volume by temperature, so the correction is to divide volume by temperature on both sides. Choice B, “The volume should be divided by temperature on each side of the equation,” gives the correct relationship.

AI-written and checked against the verified answer.

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