CHEM 103 EXAM WITH CORRECT
QUESTIONS AND ANSWERS 2025
I. How do we access chemical energy?CORRECT-ANSWERSCarry out chemical
transformations which change the types (and strengths of) chemical bonds
II. Why do combustion reactions give off energy?CORRECT-ANSWERSX-O bonds tend to
be stronger than X-X and O-O bonds
III. Order wood, Coal, Natural Gas (methane), Gasoline (C8H18), & ethanol in terms of
energy content (per gram) using table 4.3CORRECT-ANSWERSCH4 > gasoline > coal >
ethanol > wood
IV. What are the major energy-related issues/challenges facing us today?CORRECT-
ANSWERS1.) Global Climate Change (CO2)
V. 2.) Peak Oil
VI. 3.) Energy Security
,VII. 4.) Growing Demand
VIII. 5.) Impact on Economy
IX. 6.) Air & Water Pollution
X. What are the pluses of Coal?CORRECT-ANSWERS- abundance
- spread out over the globe
XI. What are the minuses of Coal?CORRECT-ANSWERS- a solid
- lower energy content than petroleum, more CO2, emission per unit energy
XII. -difficult & dangerous to obtain
XIII. -environmentally disruptive to obtain & utilize (remember So2 & NO2)
XIV. What are the pluses of natural gas?CORRECT-ANSWERS- relatively abundance (we
have a lot)
XV. -'clean' due to high energy content & less CO2 emission per unit energy than oil
, XVI. What are the minuses of natural gas?CORRECT-ANSWERS- a gas (difficult to ship
overseas)
XVII. -still does emit CO2
XVIII. -combustion still can generate NO2
XIX. What are the pluses of oil/petroleum?CORRECT-ANSWERS- high energy content
XX. -a liquid (easy to pump, store, & transport)
- we know how to use it
XXI. What are the minuses of oil/petroleum?CORRECT-ANSWERS- we're running out of it
- it tends to be in places that aren't friendly
- it does emit CO2
- combustion generates NO2
XXII. What's involved in refining crude oil to gasoline?CORRECT-ANSWERS-Distillation
XXIII. -Catalytic Cracking
QUESTIONS AND ANSWERS 2025
I. How do we access chemical energy?CORRECT-ANSWERSCarry out chemical
transformations which change the types (and strengths of) chemical bonds
II. Why do combustion reactions give off energy?CORRECT-ANSWERSX-O bonds tend to
be stronger than X-X and O-O bonds
III. Order wood, Coal, Natural Gas (methane), Gasoline (C8H18), & ethanol in terms of
energy content (per gram) using table 4.3CORRECT-ANSWERSCH4 > gasoline > coal >
ethanol > wood
IV. What are the major energy-related issues/challenges facing us today?CORRECT-
ANSWERS1.) Global Climate Change (CO2)
V. 2.) Peak Oil
VI. 3.) Energy Security
,VII. 4.) Growing Demand
VIII. 5.) Impact on Economy
IX. 6.) Air & Water Pollution
X. What are the pluses of Coal?CORRECT-ANSWERS- abundance
- spread out over the globe
XI. What are the minuses of Coal?CORRECT-ANSWERS- a solid
- lower energy content than petroleum, more CO2, emission per unit energy
XII. -difficult & dangerous to obtain
XIII. -environmentally disruptive to obtain & utilize (remember So2 & NO2)
XIV. What are the pluses of natural gas?CORRECT-ANSWERS- relatively abundance (we
have a lot)
XV. -'clean' due to high energy content & less CO2 emission per unit energy than oil
, XVI. What are the minuses of natural gas?CORRECT-ANSWERS- a gas (difficult to ship
overseas)
XVII. -still does emit CO2
XVIII. -combustion still can generate NO2
XIX. What are the pluses of oil/petroleum?CORRECT-ANSWERS- high energy content
XX. -a liquid (easy to pump, store, & transport)
- we know how to use it
XXI. What are the minuses of oil/petroleum?CORRECT-ANSWERS- we're running out of it
- it tends to be in places that aren't friendly
- it does emit CO2
- combustion generates NO2
XXII. What's involved in refining crude oil to gasoline?CORRECT-ANSWERS-Distillation
XXIII. -Catalytic Cracking
