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100+ Free Chemistry 30 Diploma Practice Questions

Pass your Alberta Grade 12 Diploma Examination - Chemistry 30 exam on the first try — instant access, no signup required.

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In a thermochemical experiment, the surroundings (water) lose heat. What can be concluded about the chemical system?

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Key Facts: Chemistry 30 Diploma Exam

Alberta's Chemistry 30 Diploma Exam is a 3-hour, machine-scored Grade 12 test of 44 multiple-choice plus 16 numerical-response questions worth 30% of the final course grade.

Sample Chemistry 30 Diploma Practice Questions

Try these sample questions to test your Chemistry 30 Diploma exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In Alberta Chemistry 30, an exothermic reaction is best described by which statement about enthalpy change?
A.The enthalpy of products is greater than the enthalpy of reactants, so delta H is positive
B.Energy is absorbed from the surroundings, so the surroundings cool down
C.The system gains potential energy and delta H equals zero
D.The enthalpy of products is less than the enthalpy of reactants, so delta H is negative
Explanation: In an exothermic reaction the products store less chemical potential energy than the reactants, so energy is released to the surroundings and delta H is negative. The surroundings warm up.
2The molar enthalpy of combustion of methane is -802.3 kJ/mol. How much energy is released when 2.00 mol of methane is completely combusted?
A.-401.2 kJ
B.-802.3 kJ
C.-1604.6 kJ
D.-1204.5 kJ
Explanation: Total enthalpy change = n x molar enthalpy = 2.00 mol x (-802.3 kJ/mol) = -1604.6 kJ. The negative sign indicates energy is released.
3In a calorimetry experiment, the quantity of heat absorbed by water is calculated using which equation?
A.q = m x c x delta T
B.q = n x delta H
C.q = c x delta T / m
D.q = m x delta T / c
Explanation: The heat absorbed or released by a substance is q = mc(delta T), where m is mass, c is specific heat capacity, and delta T is the temperature change. For water, c = 4.19 J/(g.degC).
4A 100.0 g sample of water is heated from 20.0 degC to 45.0 degC. Using c = 4.19 J/(g.degC), how much heat energy was absorbed?
A.1.05 x 10^4 J
B.8.38 x 10^3 J
C.1.88 x 10^4 J
D.4.19 x 10^3 J
Explanation: q = mc(delta T) = (100.0 g)(4.19 J/g.degC)(45.0 - 20.0 degC) = (100.0)(4.19)(25.0) = 10475 J, which is 1.05 x 10^4 J.
5On a potential energy diagram, the activation energy of the forward reaction is represented by the difference between which two points?
A.The energy of the products and the energy of the reactants
B.The energy of the activated complex (peak) and the energy of the products
C.The energy of the activated complex (peak) and the energy of the reactants
D.The energy of the reactants and the energy of the products at equilibrium
Explanation: Activation energy for the forward reaction is the energy required to reach the activated complex (the peak) starting from the reactants. It equals E(peak) minus E(reactants).
6Hess's law states that the enthalpy change of an overall reaction is equal to which of the following?
A.The sum of the enthalpy changes of the individual steps
B.The average of the enthalpy changes of the individual steps
C.The product of the enthalpy changes of the individual steps
D.The largest single enthalpy change among the steps
Explanation: Hess's law states that enthalpy is a state function, so the total enthalpy change of a reaction is the sum of the enthalpy changes of the steps into which the reaction can be divided, regardless of the pathway.
7Given: C(s) + O2(g) -> CO2(g), delta H = -393.5 kJ and CO(g) + 1/2 O2(g) -> CO2(g), delta H = -283.0 kJ. Using Hess's law, what is delta H for C(s) + 1/2 O2(g) -> CO(g)?
A.-676.5 kJ
B.-110.5 kJ
C.+110.5 kJ
D.+676.5 kJ
Explanation: Reverse the second equation (+283.0 kJ) and add to the first: -393.5 + 283.0 = -110.5 kJ. This gives the formation of CO from carbon and oxygen.
8Using standard molar enthalpies of formation, the enthalpy of a reaction is calculated as which expression?
A.Sum of delta Hf of reactants minus sum of delta Hf of products
B.Sum of delta Hf of products plus sum of delta Hf of reactants
C.delta Hf of products divided by delta Hf of reactants
D.Sum of delta Hf of products minus sum of delta Hf of reactants
Explanation: delta H(rxn) = sum of (n x delta Hf of products) minus sum of (n x delta Hf of reactants). Each formation enthalpy is multiplied by the stoichiometric coefficient.
9The standard molar enthalpy of formation of an element in its most stable form at SATP is defined as which value?
A.Always negative
B.Always positive
C.Exactly zero
D.Equal to its molar mass
Explanation: By convention, the standard molar enthalpy of formation of an element in its standard (most stable) state, such as O2(g) or C(s, graphite), is defined as exactly zero kJ/mol.
10Bond energy data can be used to estimate enthalpy of reaction. The reaction enthalpy equals which combination of bond energies?
A.Energy of bonds formed minus energy of bonds broken
B.Energy of bonds broken minus energy of bonds formed
C.Energy of bonds broken plus energy of bonds formed
D.Energy of bonds formed divided by energy of bonds broken
Explanation: Breaking bonds requires energy (endothermic, positive) and forming bonds releases energy (exothermic, negative). delta H = (sum of bonds broken) - (sum of bonds formed).

About the Chemistry 30 Diploma Exam

The Alberta Chemistry 30 Diploma Examination is a Grade 12 provincial exam set by Alberta Education's Provincial Assessment Sector. The real exam consists of 60 machine-scored questions (44 multiple-choice and 16 numerical-response of equal value) written over a designed 3 hours, with up to 6 hours allowed. It is blueprinted to the Chemistry 30 Program of Studies across four units: Thermochemical Changes, Electrochemical Changes, Chemical Changes of Organic Compounds, and Chemical Equilibrium Focusing on Acid-Base Systems. The diploma exam counts for 30% of a student's final course mark, with school-awarded coursework making up the other 70%. Diploma exams are offered in January, April, June, August, and November, with registration handled through myPass.

Questions

100 scored questions

Time Limit

3 hours (extendable to 6 hours)

Passing Score

Acceptable standard 50%; standard of excellence 80%. Exam is 30% of the final course grade.

Exam Fee

Free for first-time funded Alberta students; rewrites CAD $26.25 (incl. GST); non-funded/international students CAD $50.00 (incl. GST) per exam. (Alberta Education, Provincial Assessment Sector (Government of Alberta))

Chemistry 30 Diploma Exam Content Outline

20%

Unit A: Thermochemical Changes

Enthalpy, calorimetry, molar enthalpy, Hess's law, enthalpies of formation, bond energies, potential energy diagrams, and fossil fuels.

30%

Unit B: Electrochemical Changes

Redox, oxidation numbers, balancing half-reactions, galvanic and electrolytic cells, standard reduction potentials, Faraday stoichiometry, and corrosion.

20%

Unit C: Chemical Changes of Organic Compounds

Nomenclature of alkanes, alkenes, alkynes, aromatics, alcohols, acids and esters, plus addition, substitution, esterification, combustion, and polymers.

30%

Unit D: Chemical Equilibrium Focusing on Acid-Base Systems

Equilibrium, Le Chatelier's principle, Keq, acids and bases, pH and pOH, Ka and Kb, titrations, indicators, and buffers.

How to Pass the Chemistry 30 Diploma Exam

What You Need to Know

  • Passing score: Acceptable standard 50%; standard of excellence 80%. Exam is 30% of the final course grade.
  • Exam length: 100 questions
  • Time limit: 3 hours (extendable to 6 hours)
  • Exam fee: Free for first-time funded Alberta students; rewrites CAD $26.25 (incl. GST); non-funded/international students CAD $50.00 (incl. GST) per exam.

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

Chemistry 30 Diploma Study Tips from Top Performers

1Practise numerical-response calculations (q = mc delta T, pH/pOH, Keq, cell potential, Faraday stoichiometry) since 16 of the 60 real questions are numeric.
2Master the data booklet, especially the standard reduction potential table and the table of acid ionization constants, since the exam expects you to use it efficiently.
3Drill oxidation-number assignment and balancing half-reactions in both acidic and basic solution, as Unit B carries 29% to 32% emphasis.
4Memorize functional groups and IUPAC naming rules for alkanes, alkenes, alkynes, aromatics, alcohols, acids, and esters before tackling organic reaction types.
5Practise Le Chatelier predictions and writing equilibrium expressions, since Unit D acid-base equilibrium also carries 29% to 32% emphasis.

Frequently Asked Questions

How many questions are on the real Chemistry 30 Diploma Exam?

The real exam has 60 machine-scored questions: 44 multiple-choice and 16 numerical-response, of equal value. This free practice set provides 100 multiple-choice questions for review.

How much is the Chemistry 30 Diploma Exam worth?

The diploma exam is worth 30% of the final course grade; school-awarded coursework makes up the remaining 70%. To pass the course you need a combined final mark of at least 50%.

What are the four units of Chemistry 30?

Unit A Thermochemical Changes, Unit B Electrochemical Changes, Unit C Chemical Changes of Organic Compounds, and Unit D Chemical Equilibrium Focusing on Acid-Base Systems. Units B and D carry the heaviest emphasis.

How long is the Chemistry 30 Diploma Exam?

It is designed to be completed in 3 hours, but students may take up to 6 hours if needed. It is a closed-book exam, though a data booklet is provided.

Is there a fee to write the Chemistry 30 Diploma Exam?

First-time funded Alberta students write for free. Rewrites cost CAD $26.25 including GST, and non-funded or international students pay CAD $50.00 including GST per exam, paid through myPass.