A Certain Substance, X, Has a Triple-Point Temperature of 20°C

question 85

Multiple Choice

A certain substance, X, has a triple-point temperature of 20°C at a pressure of 2.0 atm. Which one of the following statements cannot possibly be true?

• A) X can exist as a liquid above 20°C.
• B) Both liquid and solid X have the same vapor pressure at 20°C.
• C) Liquid X can exist as a stable phase at 25°C, 1 atm.
• D) X can exist as a solid above 20°C.
• E) All of these statements could be true.

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Definitions:

Aztecs

Aztecs were a Mesoamerican culture that flourished in central Mexico in the post-classic period from the 1300s to the 1520s, before being conquered by the Spanish.

Expected Value

A statistical measure that calculates the average outcome when the future includes scenarios that may or may not happen.

Payoffs

The outcomes or returns from a particular action, investment, or decision, often used in game theory and economics.

Invest

To distribute funds or resources in anticipation of earning profits or income.