Thermochemistry
Presentation
•
Chemistry
•
11th - 12th Grade
•
Medium
Standards-aligned
Susan Campeau
Used 24+ times
FREE Resource
4 Slides • 6 Questions
1
Thermochemistry
2
Solving Thermochemistry Problems
The steps you should follow to solve science word problems are below.
1. Identify the formula you should use.
2. Write the formula
3. Recognize the unknown. This will be in the form of a question. How much heat, or what was the initial temperature.
4. Identify the variables.
5. Substitute the values given into the formula.
6. Solve for the unknown.
3
Fill in the Blanks
Type answer...
4
Multiple Choice
What was the temperature change of 150g of water if it absorbed 8304J of heat?
mass
heat
delta T
specific heat
5
Next, identify the values given in the problems. The units provide a hint.
q = heat, it will be measured in Joules or Calories
m = mass, it will be measured in grams or Kilograms
c = specific heat, it will be measured in J/g·ºC
ΔT = change in temperature, it will be measured in °C. You may have to calculate this with the formula ΔT = Final temperature - initial temperature
6
Multiple Choice
Identify the variables in this problem.
Find the specific heat of a substance that releases 7852 J when 532g cools from 80°C to 70°C.
q = 10°C, m = 532g
q = 7852J, ΔT = 10°C
q = 10°C, m = 532g, ΔT = 80°C
7
The cool thing is, this is the only formula you need!
q = mcΔT
8
Multiple Choice
Calculate the amount of heat needed to raise the temperature of 10g of aluminum from 100°C to 115°C. The specific heat of aluminum is 0.9025J/g·ºC.
135.38J
-4513J
45.13J
45.13°C
9
Multiple Choice
How much heat is lost when 789g of acetic acid is cooled from 82.7°C to 25°C. The specific heat of the acid is 2.049J/g·°C.
1674.36J
-1674.36J
3,731.25J
-3731.25J
10
Multiple Choice
A piece of silver with a specific heat of 0.2165J/g·ºC cooled from 100.0ºC to 50.0ºC and released 875g of heat. What was the mass the silver?
50ºC
17.28g
17.5g
80.83g
Thermochemistry
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