Which of These Substances Would Have the Highest Vapor Pressure

question 72

Multiple Choice

Which of these substances would have the highest vapor pressure?

• A) CH₃OH
• B) C₂H₆
• C) SO₂
• D) H₂O
• E) NH₃

---

Definitions:

S-Cam-Actuated

Describes a type of brake system, particularly in heavy vehicles, where the braking action is initiated by the rotation of an S-shaped cam.

Air Disc Brakes

Air disc brakes are a type of brake system for heavy-duty vehicles that use air pressure to apply pressure to a disc, slowing or stopping the vehicle.

FMVSS-121

A specific Federal Motor Vehicle Safety Standard related to air brake systems in trucks and buses, ensuring safe braking performance.

Service Brakes

The primary braking system used in vehicles and machinery for regular stopping and speed control, as opposed to emergency or parking brakes.