Enthalpy, Calorimetry, Hess's Law Quiz
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Here's a little quiz for Enthalpy, Calorimetry, Hess's Law.
Transcript of Enthalpy, Calorimetry, Hess's Law Quiz
Are you ready for some brain exercise?
You are still a hatchling
Welcome to the Chicken Round!
Answer the following questions to reach chickenhood.Be careful not to be roasted or fried along the way.
Start now before they make you into a street food. Go!
You have 20 seconds to read this
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What is the formula for enthalpy if the pressure is kept constant?
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It is the sum of the internal energy of the system plus the product of the pressure of the gas in the system
and its volume
Enthalpy of ReactionEnthalpy Enthalpy of Formation
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Enthalpies of formation of elements at standard conditions are equal to zero
TrueFalse
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What enthalpy change is this?
Hc,m [(graphite)] = -393.5 kJ/mol
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4
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Write the chemist’s shorthand for enthalpy of fusion
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5
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Write the chemist’s shorthand for enthalpy change of atomisation
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6
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Write the chemist’s shorthand for enthalpy change formation
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7
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The enthalpy change when 1 mole of liquid is converted to one mole of gas at its boiling point at
standard pressure is enthalpy change of fusion
TrueFalse
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8
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What is the science of measuring heat?
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9
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What is the amount of heat required to raise its temperature by a given amount?
CalorimetryHeat capacitySpecific heat capacity
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It gives the specific heat capacity per unit mass of a particular substance
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CalorimetryHeat capacitySpecific heat capacity
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SI unit for heat capacity is J/kgK
TrueFalse
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12
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The SI unit for heat capacity is…
J/kgKJ/KJ/goC
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13
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What is the formula for specific heat capacity?
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14
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What is the formula for molar enthalpy of a substance?
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15
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What law states that the heat absorbed or released during a reaction is the same whether the reaction
occurs in one or several steps?
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16
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Who formulated the law in number 17?
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17
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H sys = q (at constant pressure)
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Enthalpy
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It’s TRUE!
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Enthalpy change of combustion
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4
chemist’s shorthand for enthalpy of fusion
Hfus,m
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5
chemist’s shorthand for enthalpy change of
atomisation
Hat,m
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I didn't know you can sing and dance. Good job!
chemist’s shorthand for enthalpy change of formation
Hf,m
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7I didn't know you can sing and dance. Good
job!
It’s false.
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8No, you’re not. You’re just
jumping. Don’t get your hopes to high.
Look! I’m flying. I’m
flying!
Calorimetry
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9Yeah! I know you got it. It’s
too easy anyway.
I got it!I got it!
Heat capacity
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10So you’ve made a friend.Keep answering right and
you’ll gain more.
Specific heat capacity
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11“I keep on rockin, rockin up on the floor... Na na na
na na na…”
Correct!
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12
J/K
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13
q= mcT
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14
H= mcTn
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15Let’s do the
chicken dance
Hess’s Law of Heat Summation
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16Good job! Keep it up.
Germain Henri Hess
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17
Click to end the test
Aw! Come on you can do better than that.
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Hmm… Smells great. You’re roasted!
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Try again
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You need more exercise
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Better luck next time
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You’re fried, chicken!Um, Yum! You look so crunchy.
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Congratulations! You passed the chicken round.
You are now a fully grown chicken ready to be roasted. Are you ready for the next round?
