Unit 4 Exam Review

Front

What are intermolecular forces?

Back

Intermolecular forces are the forces that exist between molecules, influencing properties like boiling and melting points.

Front

What is the specific heat of copper?

Back

The specific heat (c) of copper is 0.39 J/g °C.

Front

How do you calculate temperature change (∆t) when heat is added?

Back

Use the formula ∆t = Q / (m * c), where Q is heat added, m is mass, and c is specific heat.

Front

What is the molarity of a solution?

Back

Molarity (M) is the number of moles of solute per liter of solution.

Front

How do you calculate molarity?

Back

Molarity = (mass of solute in grams / molar mass) / volume of solution in liters.

Front

What is percent by volume concentration?

Back

Percent by volume is calculated as (volume of solute / total volume of solution) x 100.

Front

How do you calculate energy needed to boil water?

Back

Energy (in kJ) = mass (in g) x heat of vaporization (in kJ/g). For water, it's approximately 2260 J/g.

Front

What is the heat of vaporization for water?

Back

The heat of vaporization for water is approximately 2260 J/g.

Front

What is the formula for calculating energy?

Back

Energy (Q) = mass (m) x specific heat (c) x temperature change (∆t).

Front

What is the formula for calculating temperature change?

Back

Temperature change (∆t) = Q / (m * c).