# Learning Targets - Unit 9 Thermodynamics

Mechanics

Oct 27, 2013 (4 years and 11 months ago)

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Learning Targets
-

Unit
9

Thermodynamics

1.

Define, apply and distinguish among the following key terms:

System

surroundings

potential energy

kinetic energy

phase change

melting
/freezing

point

boiling
/condensing

point

joule

kilojoule

solid

liquid

gas

condense

vaporize

endothermic

exothermic

calorimetry

specific heat

sublimation

heat content

enthalpy

bond energy

heat of reaction

(

H)

thermal equations

randomness

entropy

spontaneous

2.

Identify the system and surroundings

given a situation

3.

Describe the difference between heat and temperature

4.

Describe what happens at a molecular level as matter undergoes phase changes and temperature
changes; relate differences in particle arrangement and differences in particle motion to t
he energy
involved.

5.

Interpret heating and cooling curves in terms of kinetic and potential energy.

6.

Calculate the amount of energy transferred when a substance chang
es temperature or changes phase
using a heating/cooling curve.

7.

Distinguish between exo
-

and
endothermic processes
based on

temperature data

8.

Distinguish between exo
-

and endothermic processes given ΔH value or a thermal equation.

9.

Express ΔH value with negative sign to mean exothermic

process

and positive sign to mean endothermic

process

10.

Use a
given thermal equation to write the reaction equatio
n in ΔH notation and vice versa

11.

Calculate ΔH for a chemical reaction using a table of bond energies such as in Appendix A
-
6.

12.

Solve calorimetry problems experimentally or theoretically to determine ΔH of
a substance.

13.

Compare and contrast the
magnitude

of
the
energy
change
involved when substances melt, boil, react
chemically, or undergo nuclear reactions. Explain the reasons for these differences.

14.

Predict whether a reaction favors reactants or products b
ased on its enthalpy change

(

H)

and entropy
change

(

S)
.

(Gibb’s Free Energy,

G)