$q = m \times c \times \Delta T$

Question 1

Which of the following best describes the difference between solids, liquids, and gases in terms of particle arrangement and energy?

Accepted Answer

Gases have widely spaced particles with high kinetic energy.

Question 2

A sample of water is heated from 25°C to 100°C. Which process occurs at 100°C and what type of energy change is involved?

Accepted Answer

Boiling; increase in potential energy

Question 3

Which formula correctly represents the calculation of density?

Accepted Answer

$Density = \frac{Mass}{Volume}$

Question 4

A chemist measures the boiling point of a liquid in the laboratory. Which of the following best describes this type of measurement?

Accepted Answer

Physical property measurement

Question 5

Which of the following is an example of a mixture?

Accepted Answer

Air

Question 6

Which equation is used to calculate the heat required to raise the temperature of a substance?

Accepted Answer

$q = m 	imes c 	imes \Delta T$

Question 7

Which statement best describes the concept of enthalpy ($\Delta H$) in a chemical reaction?

Accepted Answer

It is the heat absorbed or released at constant pressure.

Question 8

A balloon filled with helium gas is placed in a cold room. What happens to the pressure inside the balloon, and which law explains this behavior?

Accepted Answer

Pressure decreases; Gay-Lussac's Law

Question 9

Which of the following best describes the difference between intermolecular and intramolecular forces?

Accepted Answer

Intermolecular forces occur between molecules; intramolecular forces occur within a molecule.

Question 10

Which of the following is a correct application of the VSEPR theory?

Accepted Answer

Determining the shape of a molecule based on electron pair repulsion

Question 11

Which of the following best explains why ionic compounds have high melting points?

Accepted Answer

They have strong electrostatic attractions between ions.

Question 12

Which equation represents the relationship between pressure, volume, and temperature for an ideal gas?

Accepted Answer

$PV = nRT$

Question 13

A solution is prepared by dissolving 10 g of NaCl in 100 g of water. Which term best describes NaCl in this scenario?

Accepted Answer

Solute

Question 14

Which of the following is a correct statement about electronegativity?

Accepted Answer

Electronegativity increases across a period from left to right.

Question 15

Which process is endothermic?

Accepted Answer

Melting of ice

Question 16

Which of the following best describes the role of a catalyst in a chemical reaction?

Accepted Answer

It speeds up the reaction by lowering the activation energy.

Question 17

Which of the following is the correct formula for calculating the molarity of a solution?

Accepted Answer

$Molarity = \frac{moles\ of\ solute}{volume\ of\ solution\ (L)}$

Question 18

Which of the following best explains why water has a high heat of vaporization?

Accepted Answer

Water has strong hydrogen bonds between molecules.

Question 19

Which of the following is a correct statement about atomic radius in the periodic table?

Accepted Answer

Atomic radius decreases across a period from left to right.

Question 20

A student mixes two clear solutions and observes the formation of a white precipitate. What type of reaction has occurred?

Accepted Answer

Precipitation reaction

General Chemistry I: Comprehensive Study Guide

Study Guide - Practice Questions