Download QUESTION

Gas Laws
States of
Matter
Reactions
Changing
Phases
It’s all about
Heat
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Gas Laws – 10 Points
QUESTION:
What relationship causes an inflated
balloon to expand when it is heated?
ANSWER:
•The Volume increases as the temperature
increases
Gas Laws – 20 Points
QUESTION:
How many moles of steam are produced at 1.00
atm and 468 K by the complete combustion of
3.50 L of methane gas?
ANSWER:
• 0.09 moles
Gas Laws – 30 Points
QUESTION:
A mixture of nitrogen, hydrogen, and water
vapor has a total pressure of 824 mm Hg. The
partial pressure of nitrogen is 421 mm Hg and
that of hydrogen is 1.50 mmHg. What is the
partial pressure of water vapor?
ANSWER:
•401.5 mm Hg
Gas Laws – 40 Points
QUESTION:
How many moles of Hydrogen gas are in
230 L of Hydrogen gas at standard
temperature and pressure?
ANSWER:
•5152 L
Gas Laws – 50 Points
QUESTION:
A gas is confined in a steel tank. At 10.30°C,
the gas exerts a pressure of 9.532 atm. After
heating the tank, the pressure of the gas
increases to 11.606 atm. What is the
temperature of the heated gas?
ANSWER:
•345 K or 72 C
States of Matter – 10 Points
QUESTION:
During a phase change, the temperature of a
substance ____.
ANSWER:
• Stays
the same
States of Matter – 20 Points
QUESTION:
•At what Temperature does it
transition from a gas to a
liquid?
ANSWER:
•80 Celsius
States of Matter – 30 Points
QUESTION:
What happens to the energy and temperature during a
phase change?
ANSWER:
•Breaks the inter molecular forces between the molecules
States of Matter – 40 Points
QUESTION:
•What is the temperature
and pressure at which this
substance can be found at
all three states of matter.
ANSWER:
•0.75 atm and 100 C
States of Matter – 50 Points
QUESTION:
On a phase diagram, what does the critical
point represent?
ANSWER:
The temperature above which no amount of
pressure can cause the substance to return to liquid
form.
Reactions – 10 Points
QUESTION:
The reaction below is:
Na2CO3 + H2O + CO2  2NaHCO3+ 520 J
ANSWER:
•Exothermic
Reactions – 20 Points
QUESTION:
This Reaction is _______
ANSWER:
•Exothermic
Reactions – 30 Points
QUESTION:
•The arrow represents:
ANSWER:
•Enthalpy
Reactions – 40 Points
QUESTION:
•Melting is an example of entropy
_________
ANSWER:
•increasing
Reactions – 50 Points
QUESTION:
•An Endothermic reaction would feel _______to the touch
ANSWER:
•cold
Changing Phases – 10 Points
QUESTION:
•Heat is the transfer of energy and occurs from
_______to ___________.
ANSWER:
•Hot to Cold
Changing Phases – 20 Points
QUESTION:
•Type your question in here relating to Topic 4. As the Points
get higher make questions harder.
ANSWER:
•(type answer here)
Changing Phases – 30 Points
QUESTION:
How much heat is required to vaporize 541 g of
liquid water at 100oC?
ANSWER:
•1.22 X 106 J
Changing Phases – 40 Points
QUESTION:
How much energy is absorbed when 25 g of ice
melts at 0 oC?
ANSWER:
•8350 J
Changing Phases – 50 Points
QUESTION:
During a laboratory experiment, 25 grams of water at
100oC is transformed into steam at 102oC. How much heat
energy is needed to completely change the state of the
water?
ANSWER:
•56601 J
It’s all about Heat – 10 Points
QUESTION:
•How much energy is absorbed when 8 g of ice at
-10oC changes to – 5 oC?
ANSWER:
•82 J
It’s all about heat – 20 Points
QUESTION:
What is the amount of heat required to raise
the temperature of 100.0 g of zinc from 5 0C to
20 0C? (specific heat of zinc = 0.388 )
ANSWER:
•582 J
It’s all About Heat – 30 Points
QUESTION:
What is the substance if 1347.5 J are required
to raise the temperature of a 350-g sample by
10 0C?
ANSWER:
•Copper
It’s all about Heat – 40 Points
QUESTION:
When 50 g of an alloy, at 20 0C, are dropped
into 100.0 g of water, the alloy absorbs 1050 J
of heat. If the final temperature of the alloy is
38 0C, what is its specific heat?
ANSWER:
•1.2 J/ g 0C
It is all about Heat – 50 Points
QUESTION:
What is the amount of heat required to raise
the temperature of 100.0 g of aluminum from
5 0C to 80 0C?
(specific heat of aluminum = 0.21 )
ANSWER:
•1575 J