Gce Model Questions Vol1 2019 Chemistry Question 38

Practice objective / multiple choice question 38 from the 2019 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2019 Chemistry Objective / Multiple Choice Hard Difficulty
Question 38 GCE_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • objective

Using the average bond enthalpies below, calculate the standard enthalpy change for the complete combustion of one mole of butane (\(\mathrm{C_{4}H_{10}}\)) according to the equation \(\mathrm{C_{4}H_{10} + \frac{13}{2} O_{2} \rightarrow 4 CO_{2} + 5 H_{2}O}\). Bond enthalpies (kJ mol⁻¹): C-C 346, C-H 413, O=O 498, C=O (in CO₂) 799, O-H 463. State whether the reaction is exothermic or endothermic.

Answer Options

A. -1.95×10³ kJ mol⁻¹ (approximately -1950 kJ mol⁻¹)
Correct Answer B. -2.62×10³ kJ mol⁻¹ (approximately -2617 kJ mol⁻¹)
C. -3.05×10³ kJ mol⁻¹ (approximately -3050 kJ mol⁻¹)
D. -2.12×10³ kJ mol⁻¹ (approximately -2120 kJ mol⁻¹)
Correct Answer
B
Correct Option:
-2.62×10³ kJ mol⁻¹ (approximately -2617 kJ mol⁻¹)

About This Question

This is Gce Model Questions Vol1 2019 Chemistry Question 38. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

View More Gce Model Questions Vol1 2019 Chemistry Questions More Gce Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support