Chapter 14, Problem 67AP

Interpretation Introduction

(a)

Interpretation:

Quantity of heat required to heat $5.0\text{g}$ of potassium from ${25.3}^0\text{C}$ to ${45.2}^0\text{C}$ must be calculated.

Concept Introduction:

To increase the temperature of a solid we need to supply heat energy. Specific heat plays crucial role in increase of temperature of a substance.

Interpretation Introduction

(b)

Interpretation:

How much heat energy will be required to melt $1.35$ mol of potassium at its normal melting point must be calculated?

Concept Introduction:

Melting point is the temperature at which a solid starts melting to liquid and until all the solid is not melted temperature remains same.

Interpretation Introduction

(c)

Interpretation:

How much heat energy will be required to vaporize $2.25\text{g}$ of potassium at its normal boiling point must be calculated?

Concept Introduction:

Boiling point is the temperature at which a liquid starts boiling to vapor and until all the liquid is not boiled off temperature remains same.