Warm-Up 5/15/15

1
Warm-Up 5/15/15 Prepare notebook to be checked

• Complete Data Table
• Analysis Calculations for each sample chart
  form
• (2nd trial extra credit)
• STAMPS
• Warm-up 4/29/15 Homework 5/5/15
• Warm-up 5/5/15 Warm-up 5/14/15

2

• Monday (May 18th)
• Food Unit Test
• Converting from Calories ? joules
• Converting from joules ? Calories
• Reading a nutritional label for serving/Calories
• Specific Heat
• Endothermic vs. Exothermic

3
Week Overview
Mon Tues Wed Thurs Fri
14 Finish Soda Can Lab 15 Exothermic vs. Endothermic Food Unit Test Review
18 Food Unit Test Last Day - Seniors 19 Review - Stoichiometry 20 Review Acid/Base 21 Minimum Day Review Food Unit 22 Finals Start
4
Checked Already
1) Summarized Introduction (1-2 paragraphs) 2)
Terms defined 3) Summarized Procedure with
picture drawn (step 1). 4) Data table (blank) 5)
Pre-lab Questions
5

• Warm-Up 5/11/15
• Pre-Lab Questions with the Soda Can Lab write-up
• What does each part of the specific heat equation
  mean? q mc?T.
• 2) If during the experiment, a peanut was used to
  heat 50g of water and the temperature of it rises
  from 25oC to 34oC, how much heat was supplied to
  the water? The specific heat of water is
  4.18J/(goC).

6
Data Table
Food Sample Initial Mass (g) Final Mass (g) Initial Temp (oC) Final Temp (oC)
Peanut
Peanut
Craisin
Craisin
Chocolate Chip
Chocolate Chip
Do ONE trial each before doing a second.
7
The Flow of Energy
Heat always flows from a warmer object to a
cooler object.
When talking about energy flow, we look at the
system and its surroundings.
8
The Flow of Energy
Together, the system and its surroundings make up
the universe.
9
Endothermic Process
Energy (heat) flows INTO the system
10
Exothermic Process
Energy (heat) flows OUT OF the system