Chemistry 1031 Exam II, Fall 2016

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Questions and Answers

What is the total available points for the exam including extra credit?

110 (correct)

120

100

How many points is each multiple choice question worth?

4 points each (correct)

2 points each

5 points each

3 points each

What should you write on the Scantron sheet?

Your phone number

The exam date

Your TU ID (correct)

Your TA's name

What happens if no work is shown for the open-ended problems?

No credit is given Signup and view all the answers

What is the maximum score for multiple choice questions in this exam format?

80 Signup and view all the answers

Which of the following is NOT allowed at your examination desk?

Graphing calculator Signup and view all the answers

How should you transfer your answers from the exam packet to the Scantron sheet?

Fill in the bubbles provided on the Scantron Signup and view all the answers

What is the consequence of violating academic integrity during the examination?

You may face disciplinary action Signup and view all the answers

What will be the pressure of carbon dioxide produced from the combustion of glucose if 4 moles of oxygen are consumed in a 250 L vessel at 25.0 °C?

0.980 atm Signup and view all the answers

What type of reaction occurs during the combustion of glucose based on its ΔH?

An exothermic reaction Signup and view all the answers

Which gas is expected to be the least dense at a temperature of 300 K and pressure of 1.2 atm?

Helium (He) Signup and view all the answers

When a block of hot iron is dropped into an insulated cup with vegetable oil, what should be assumed for the thermal interaction of the two?

They are thermally isolated from the surroundings Signup and view all the answers

Which of these processes involves hydrolysis of saccharose into glucose?

Decomposition Signup and view all the answers

If a balloon contains 1.30 L of helium at STP and is compressed to 3 atm, what would be the new volume of the balloon?

0.300 L Signup and view all the answers

Which gas molecule would have the highest rate of effusion under the same conditions of temperature and pressure?

14N2 Signup and view all the answers

When considering the enthalpy of reaction for hydrolysis of saccharose, which value is directly derived?

The sum of individual combustion enthalpies Signup and view all the answers

In the van der Waals’s equation, the constant 'a' is responsible for which of the following?

It accounts for the increase in pressure due to the attractions between the gas particles. Signup and view all the answers

Which of the following best describes why hydrogen does not exhibit a real volume smaller than that of an ideal gas at low pressure?

Hydrogen molecules have the smallest volume compared to the others. Signup and view all the answers

How is the constant 'b' in van der Waals’s equation best described?

It represents the decrease in volume resulting from particle attractions. Signup and view all the answers

Which curve in the graph of M-B distribution corresponds to neon?

Curve B Signup and view all the answers

To which curve will the one for fluorine gas (F2) most likely resemble?

Curve C Signup and view all the answers

Which curve in the M-B distribution graph represents the hottest sample of N2 gas?

Curve A Signup and view all the answers

What is a specific heat capacity?

15.3 J / kg K Signup and view all the answers

What does the M-B distribution graph indicate about gases at different temperatures?

Higher temperatures result in curves that are flatter and wider. Signup and view all the answers

Study Notes

Exam Instructions

Chemistry 1031, Fall 2016, Exam II
Multiple choice questions (1-20) are worth 80 points (4 points each)
Problems (A, B, and C) are worth 10 points each
Total points available are 110 (6 extra credit)
Answers to multiple choice should be transferred to a scantron
Scrap paper allowed for problems and on page 3 and 4 of packet
Detailed work on open-ended problems needed for credit
No graphing calculators or cell phones allowed
Violations of rules can result in disciplinary action
Exam packet includes name, ID, recitation, and TA info
Scantron sheet info includes TU ID, name, printed, and filling in bubbles

Exam Questions (Open-Ended Problems)

Problem A: 4 moles of oxygen gas consumed during combustion of an unknown amount of C₆H₁₂O₆. Calculate the pressure of carbon dioxide formed at 25.0°C in a 250 L vessel.
Problem B: A block of hot iron with a known specific heat is dropped into a known volume of oil with a known specific heat. Calculate the mass of the hot iron block, given that the temperatures of the oil and iron change by 60°C.
Problem C: Calculate the enthalpy for the hydrolysis reaction of sucrose to two glucose molecules, given the combustion enthalpies of glucose and sucrose.

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Description

Test your knowledge with this comprehensive exam for Chemistry 1031, focusing on combustion reactions and heat transfer. The exam includes multiple-choice questions and open-ended problems related to gas pressure and specific heat. Make sure to follow the exam instructions carefully for a successful attempt.