There is a total of three questions all pertaining to chemical thermodynamics. All work must be answered thoroughly, thoughtfully, and must be 100% original. Grading rubric is included. Will also include the periodic table that will need to be used.
unit_4_test_part_2.doc
unit_4_part_2_rubric.docx
unit_4_part_2_rubric_2.docx
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Graded Assignment Answer Key
SCI304B: Honors Chemistry | Unit 4 | Lesson 13: Unit Test
Graded Assignment
Unit Test, Part 2
Unless otherwise instructed, students may use a scientific calculator and refer to the periodic table in the
Chemistry: Problems and Solutions book for this test.
(5 points)
1. Islands in the middle of the oceans (for example, Great Britain, Hawaii, Bermuda) tend to have more stable
climates with smaller temperature fluctuations than regions of the same mass surrounded by land (for example,
continents). Use your knowledge of heat energy, specific heat, and heat transfer to explain these facts.
(8 points)
2. Baking soda is sodium bicarbonate (NaHCO3). When you heat baking soda, it breaks down into sodium
carbonate powder (Na2CO3), water vapor, and carbon dioxide. The enthalpy of this reaction is 129 kJ. Write a
correct thermochemical equation for this reaction, explain how you came up with this equation, and explain
what it tells you about the reaction.
(8 points)
3. Given the following equations, calculate the ΔH of reaction of ethylene gas (C2H4) with fluorine gas to make
carbon tetrafluoride (CF4) gas and hydrogen fluoride gas. Show your work.
H2 (g) + F2 (g) → 2HF (g)
ΔH = –537 kJ
C (s) + 2F2 (g) → CF4 (g)
ΔH = –680 kJ
2C (s) + 2H2 (g) → C2H4 (g)
ΔH = +52.3 kJ
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`
Complete
5 points
Sufficient
4 points
Partial
3 points
Falls Below
2 points
Unanswered
0 points
Use your
knowledge of heat
energy, specific
heat, and heat
transfer.
You must write a
Question 1 You must write a
complete
coherent paragraph paragraph.
using the ELA
Rubric – purpose,
elaboration,
evidence, language
and conventions.
`
Complete
8 points
Write a
thermochemical
equation. Make
Question 2 sure to answer all
parts of the
question and show
your work.
`
Complete
8 points
Calculate the ΔH of
reaction with
several steps in the
reaction using
Question 3 Hess’s law. Make
sure to answer all
parts of the
question and show
your work.
Overall
Score
100%
21 or more
Complete
6 points
Make sure to
answer all parts of
the question and
show your work.
Complete
6 points
Make sure to
answer all parts of
the question and
show your work.
Grade A
18.9 or more
You must write a
complete
paragraph.
Partial
4 points
Make sure to
answer all parts of
the question and
show your work.
Partial
4 points
Make sure to
answer all parts of
the question and
show your work.
Grade B
16.8 or more
You must write a
You must write a
complete paragraph. complete paragraph.
Falls Below
2 points
Missing
0 points
Make sure to answer
Make sure to answer
all parts of the
all parts of the question
question and show
and show your work.
your work.
Falls Below
2 points
Missing
0 points
Make sure to answer
Make sure to answer
all parts of the
all parts of the question
question and show
and show your work.
your work.
Grade C
14.7 or more
Grade D
12.6 or more
Grade F
0 or
more
`
Purpose
Exceeds
0.2 points
`
Language
Falls Below
0.12 points
Falls Far
Below
0 points
The response doesn’t
The response exhibits
address the controlling
limited understanding and
idea, demonstrating
interpretation of the
misunderstanding of the
controlling idea.
controlling idea.
This
response does
not meet unit
objectives for
purpose.
The response addresses
most aspects of the
prompt, however one part
of the answer may not be
fully developed, showing
limited understanding of
the topic and text.
The response addresses
some aspects of the
prompt, but leaving
significant parts to be
underdeveloped. Response
demonstrates very limited
understanding of the topic
and text.
The response does not
address the
prompt. Significant parts
are underdeveloped and
demonstrate unfamiliarity
with the text
This
response does
not meet unit
objectives for
elaboration.
The response provides
relevant and thorough
textual evidence,
smoothly integrated to
support all aspects of
the prompt. Evidence
supports all aspects of
the prompt and is
clearly explained.
The response provides
relevant and thorough
textual evidence that may
not be smoothly
integrated. Evidence
supports all aspects of the
prompt and is clearly
explained.
The response includes
some textual evidence
that may not be smoothly
integrated. Relevance of
evidence may not be
clearly and fully explained
to show support of the
prompt.
The response is lacking
textual evidence, either
paraphrased or quoted,
even though the prompt
is addressed.
This
response does
not meet unit
objectives for
textual
evidence.
Exceeds
0.2 points
Meets
0.16 points
Approaching
0.14 points
The response
consistently uses
formal and precise
language, varied
sentence structure,
and academic and
domain-specific
vocabulary
There are no errors in
grammar, spelling,
punctuation, or
Conventions sentence
structure. Writing
exhibits no patterns of
error.
Overall
Score
Approaching
0.14 points
The response exhibits
acceptable
understanding and
interpretation of the
controlling idea.
The response exhibits
thorough, accurate
understanding and
interpretation of
controlling idea.
The response is fully
developed
with detail that
Elaboration
demonstrates an
understanding of the
topic and text.
Evidence
Meets
0.16 points
Exceeds
0.9 or more
Falls Below
0.12 points
Falls Far
Below
0 points
The response uses formal
and precise language, but
not
consistently. Sentence
structure is varied and
vocabulary is academic
and domain-specific.
The response is written
using informal language
with basic use of
sentence structure and
some academic
vocabulary.
The response uses
informal language, and
may include cultural
colloquialisms. Sentence
structure is very basic
and academic
vocabulary is not
present.
This
response does
not meet unit
objectives for
language.
There are very few errors
in grammar, spelling,
punctuation, or sentence
structure, they do not
interfere with
readability. Writing
exhibits no patterns of
error.
There are some errors in
grammar, spelling,
punctuation, or sentence
structure, they interfere
with readability, but not
purpose. Writing exhibits
minor patterns of error.
There are several errors
in grammar, spelling,
punctuation, or sentence
structure, they interfere
with readability, and
purpose. Writing exhibits
patterns of error.
This
response does
not meet unit
objectives for
conventions.
Meets
0.8 or more
Approaching
0.7 or more
Falls Below
0.6 or more
Falls Far
Below
0 or more
…
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