1. Specific Heat
Quantity of energy needed to increase the temperature of one gram of a substance by one degree Celsius/Kelvin
Every substance has its own unique specific heat
Specific heat of water is J/g∙∘K
Teacher: Explain background key points (The general what and why.)
Students: Listen, then get an opportunity to digest the information in a think-pair-share or write-pair-share.
Think-Pair-Share: What is happening to the movement of particles as energy is added? How is particle movement measured?

2. Specific Heat Equation
Q = m c ∆T
If Q is positive, the substance absorbed heat.
If Q is negative, the substance released heat.
Q = Heat (cal or J)
m = Mass (g)
c = Specific heat (J/g∘K)
∆T = Change in temperature
1 cal = 4.18 J
1000 cal = 1 kcal
0 ∘C = 273 K
Teacher: Explains how they break down the problem, how they attack the problem, then carefully explain how they avoid pitfalls/misconceptions. Key points should be posted either on this screen (off to the side), on the board, or on handout. Ask quick low-level questions during to keep students participating (Ex: Is this a positive or a negative?) . After go through example, ask a CFU that gets students to process information. Consider having them write it down or take to a neighbor before answering. (Ex: Is this answer reasonable? Does it make sense given the situation? Why or why not?)
Students: Work silently through the problem with the teacher. Answer quick low-level questions.
Check For Understanding: It was 45 degrees this morning, now it’s 63. How do you find the temperature change?

3. Example 1
How it’s done:
List your givens and unknowns
Rearrange Specific Heat formula to solve for c.
Convert units if needed
Plug in and solve
An unknown substance, with a mass of 50.0 g, is heated from 25 ∘C to 100. ∘C. During the heating process the substance absorbs 750. J of energy. What is the specific heat of the unknown substance in J/g∙∘C?
Teacher: Explains how they attack the problem, then carefully explain how they avoid pitfalls/misconceptions. Key points should be posted either on this screen (off to the side), on the board, or on handout. Ask quick low-level questions during to keep students participating (Ex: What equation should I use? What happens next? Is this a positive or a negative?) . After go through example, ask a CFU that gets students to address a misconception. Consider having them write it down or take to a neighbor before answering. (Ex: If I had gotten 2 as the answer, what might I have been confused about?)
Students: Work silently through the problem with the teacher. Answer quick low-level questions.
Check For Understanding: What does the answer mean? Based on the definition of specific heat, interpret your answer.

4. Problem 1 (With your partner)
2 min
A 21.0 g sample of a substance with a specific heat of J/g∘C is heated from 288 K to 434 K. How much heat, in Joules, was absorbed by the substance?
Teacher: Posts question. Tells students to work on this problem with their partner for 2 min. Monitors heavily during practice walking around to different pairs.
Students: Work through problem with partner on whiteboard or notebook for 2 min.
Teacher: Brings it back whole group. Asks them to explain a couple of steps, then checks for a misconception. (1.5 Min only)
Check For Understanding: Why does it not matter is specific heat capacity is given in J/g°C or J/gK?

5. Problem 2 (With your partner)
2 min
A student must use 225 g of hot water in a lab procedure. Calculate the amount of heat required to raise the temperature of 225 g of water from 20.0 °C to °C. (Specific heat of water is J/g°K)
Teacher: Posts question. Tells students to work on this problem with their partner for 2 min. Monitors heavily walking around to different pairs.
Students: Work through problem with partner on whiteboard or notebook for 2 min.
Teacher: Brings it back whole group. Asks them to explain maybe just the first step, the answer, then checks for a misconception. (1.5 Min only)

6. Problem 3 (Try it yourself first)
2 min
A 40.0 g sample of ethanol releases 2952 J as it cools from 50.0 °C. Calculate the final temperature of the ethanol. c = 2.46 J/g°C
Teacher: Posts question. Tells students to work on this problem on their own for 1 minute, then for the second minute work with a partner.
Students: Work through problem on own then with partner on whiteboard or notebook for
Teacher: Monitors everyone while they are working. Quickly gives feedback. Asks students to hold up answers, determines to ask a question about a misconception or not based on where people are. (1 Min only)