
Heat and Calorimeter
Presentation
•
Chemistry
•
12th Grade
•
Hard
Joseph Anderson
FREE Resource
6 Slides • 2 Questions
1
Calorimetry exothermic
calorimeter endothermic
system energy diagram
surrounding
enthalpy
Keyword
1.2.1 Define calorimetry
1.2.2 Define calorimeter 1.2.3 Describe the two types of calorimeters (Bomb calorimeter & Coffee-cup calorimeter) 1.2.4 Perform different calculations in a calorimetry experiment – For Mixing aqueous solutions 1.2.5 Perform different calculations in a calorimetry experiment – For Adding a metal to water
1.2.6 Define thermochemistry
1.2.7 Differentiate among the system, the surrounding and the universe
1.2.8 Define enthalpy (H)
1.2.9 Define enthalpy change of reaction (ΔHrxn) while writing the equation used
Objectives
2
3
4
Enthalpy
Thermochemistry is the study of heat changes that accompany chemical reactions and phase changes. |
Thermochemistry and Enthalpy
Thermochemistry
Enthalpy (H) is the heat content of a system at constant pressure. |
5
is the amount of energy released or absorbed during a chemical reaction |
The value of ΔHrxn can be determined by measuring the heat flow of the reaction at constant pressure. |
Enthalpy change of reaction (ΔH) |
6
Match
system
surrounding
the heat content of a system at constant pressure
Heat flows into the system from its surroundings.
Heat flowing out of a system into its surroundings is defined as negative
is the specific part of the universe that contains the reaction or process to study
is everything in the universe other than the system.
Enthalpy (H)
Endothermic Process
Exothermic Process
is the specific part of the universe that contains the reaction or process to study
is everything in the universe other than the system.
Enthalpy (H)
Endothermic Process
Exothermic Process
7
Open Ended
Consider the following diagram to answer questions a – f
a) Which diagram represents an exothermic process?
b) Which diagram represents an endothermic process?
c) Is heat flow positive or negative in diagram (a)?
d) Is heat flow positive or negative in diagram (b)?
e) What does a negative value for heat represent?
f) What does a positive value for heat represent?
8
Calorimetry exothermic
calorimeter endothermic
system energy diagram
surrounding
enthalpy
Keyword
1.2.1 Define calorimetry
1.2.2 Define calorimeter 1.2.3 Describe the two types of calorimeters (Bomb calorimeter & Coffee-cup calorimeter) 1.2.4 Perform different calculations in a calorimetry experiment – For Mixing aqueous solutions 1.2.5 Perform different calculations in a calorimetry experiment – For Adding a metal to water
1.2.6 Define thermochemistry
1.2.7 Differentiate among the system, the surrounding and the universe
1.2.8 Define enthalpy (H)
1.2.9 Define enthalpy change of reaction (ΔHrxn) while writing the equation used
Objectives
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