Test 2 - 6th 6wks
Presentation
•
Chemistry
•
9th - 12th Grade
•
Medium
Kyle Pearson
Used 5+ times
FREE Resource
6 Slides • 6 Questions
1
Fission
Fusion
2
Power of Hydrogen
Measures the amount of hydrogen in a solution
Use -LOG to calculate pH
Use 10 to the negative superscript to calculate molarity of hydrogen ions
3
Multiple Choice
What is the energy of moving objects, or the energy of moving parts of a machine?
mechanical
kinetic
chemical
elastic
4
5
Endothermic reactions absorb heat from the surroundings
Endothermic reactions have positive joules
Energy is found in the reactants
Products have more energy than reactants
6
Exothermic reactions release heat to the surrounding
Exothermic reactions have negative joules
Energy is found in the products
Reactants have more energy than products
7
Multiple Select
Click on ALL of the reactions that are exothermic.
2 H2(g) + O2(g) → 2 H2O(ℓ) ΔH = −570 kJ
CO2(g) + H2(g) + 42 kJ → CO(g) + H2O(g)
28 kJ are released
NaOH (aq) + HCl(aq) → NaCl(aq) + H2O(ℓ) + 56 kJ
88 Joules absorbed
8
Heat Calculations
9
Multiple Choice
What unit do you use to measure Thermal Energy?
Joules
grams
heat
J/gC
10
Multiple Choice
A water bottle is placed in a freezer.
Which way does energy (heat) flow?
into the freezer
into the water
neither
both
11
Fill in the Blanks
A 891.6 g sample of tin is subjected to a temperature change of
-34.25 °C. The specific heat capacity of tin is 0.227 J/(g·°C).
How many joules of heat were transferred by the sample?
Use the the correct rounding sig fig rules for the final answer.
Type answer...
12
Fill in the Blanks
A 894.5 g sample of neon absorbs 532.2 joules of heat. The specific heat capacity of neon is 1.0301 J/(g·°C).
By how much did the temperature of this sample change, in degrees Celsius?
Round the calculator answer using the correct sig fig rounding rules.
Type answer...
Fission
Fusion
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