10-minute Quiz : Ch34 Standard enthalpy changes of reactions

10-minute Quiz : Ch34 Standard enthalpy changes of reactions

9th - 12th Grade

10 Qs

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10-minute Quiz : Ch34 Standard enthalpy changes of reactions

10-minute Quiz : Ch34 Standard enthalpy changes of reactions

Assessment

Quiz

Chemistry

9th - 12th Grade

Hard

Created by

Chemistry Aristo

Used 1+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following are the standard conditions for measuring enthalpy change?

(1) A temperature of 298 K

(2) A pressure of 1 atm

(3) Using one mole of each reactant

A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Consider the thermochemical equation as shown. Which of the following statements are correct?

(1) The reaction is exothermic.

(2) The equation represents the standard enthalpy change of formation of nitric acid.

(3) The standard enthalpy change of the reaction: 2HNO₃(l) → N₂O₅(g) + H₂O(l) is +77.0 kJ mol⁻¹.

A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following equations represents the standard enthalpy change of formation of calcium bromide?
A. Ca(s) + Br₂(g) → CaBr₂(aq)
B. Ca(s) + Br₂(g) → CaBr₂(s)
C. Ca(s) + Br₂(l) → CaBr₂(aq)
D. Ca(s) + Br₂(l) → CaBr₂(s)

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The standard enthalpy changes of formation of graphite and diamond are 0 kJ mol⁻¹ and +1.9 kJ mol⁻¹ respectively. Which of the following statements is/are correct?

(1) Graphite is energetically more stable than diamond.

(2) Graphite has higher energy content than diamond.

(3) The C−C bonds in graphite are weaker than those in diamond.

A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is the standard state of iodine?
A. I₂(g)
B. I₂(l)
C. I₂(s)
D. I₂(aq)

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image
Which of the following expressions gives the mass (in g) of ethanol needed to produce 209.6 kJ of heat upon complete combustion?

A. 209.6/(1367 × 60.0)

B. 1367/(209.6 × 60.0)

C. (209.6 × 60.0)/1367

D. (1367 × 60.0)/209.6

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In an experiment, 50 cm³ of 1.0 M CH₃COOH(aq) is mixed with 50 cm³ of 1.0 M NaOH(aq) in a simple calorimeter. The maximum temperature rise of the reaction mixture is 4.6°C. What is the enthalpy change of neutralization between CH₃COOH(aq) and NaOH(aq)?

(Assume that the specific heat capacity and density of the reaction mixture are the same as those of water, i.e. 4.2 J g⁻¹ K⁻¹ and 1.0 g cm⁻³ respectively.)

A. −19.3 kJ mol⁻¹
B. −29.0 kJ mol⁻¹
C. −38.6 kJ mol⁻¹
D. −57.3 kJ mol⁻¹

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