10-minute Quiz : Ch34 Standard enthalpy changes of reactions
Quiz
•
Chemistry
•
9th - 12th Grade
•
Hard
Chemistry Aristo
Used 1+ times
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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
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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.)
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