Heat Is Added to a Pure Substance in a Closed

question 17

Multiple Choice

Heat is added to a pure substance in a closed container at a constant rate.The figure shows a graph of the temperature of the substance as a function of time.If L_f = latent heat of fusion and L_v = latent heat of vaporization,what is the value of the ratio L_v / L_f for this substance?

• A) 5.0
• B) 4.5
• C) 7.2
• D) 3.5
• E) 1.5

---

Definitions:

Reagents

Chemical substances that are employed to bring about a chemical reaction in a provided set of reactants.

Reaction

A process in which substances (reactants) are transformed into different substances (products) through chemical change.

2-Methyl-2-Octene

An organic compound characterized by an eight-carbon chain with a double bond between carbon numbers 2 and 3, and a methyl group attached to the second carbon.

2-Methyloctan-3-Ol

A chemical compound, specifically an alcohol, that is derived by adding a methyl group and a hydroxyl group to an octane chain.