What you need: Pen and paper. Fe2O PART A Cao What to do: From the table of the standard entropy values, calculate the standard entropy changes for the following reactions at 25°C. Write your answers in a separate sheet of paper. CO2 CaCC 1. CaCO, →CaO, +CO,) 2. N +3H, NH3 →2NH, 2(g) 2(g) 3(g) N2 PART B H2

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Activity 2. Standard Entropy (LAS 5.a)
Learning Objectives:
1. Calculate the standard entropy changes of a reaction.
2. Identify the spontaneity of a process based on entropy.
Substance
S° (J/K-mol)
Fe
27.3
What you need: Pen and paper.
O2
205
Fe2O3
87.4
PART A
Cao
39.8
What to do: From the table of the standard entropy values, calculate the
standard entropy changes for the following reactions at 25°C. Write your
answers in a separate sheet of paper.
Co2
213.6
CaCO3
92.9
1. СаСО, > Са),, + СО,де
2. Nze +3H%
3(s)
(s)
NH3
193
→2NH,
2(g)
3(g)
N2
192
PART B
H2
131
What to do: Identify whether the entropy change of the system in each of the
following reactions is positive or negative. Write your answers in a separate
sheet of paper.
HCI
187
Cl2
223
+Oe →2H,0
2. NH,CI, → NH + HCI
1. 2H
2(g)
2(g)
3(g)
(g)
Transcribed Image Text:Activity 2. Standard Entropy (LAS 5.a) Learning Objectives: 1. Calculate the standard entropy changes of a reaction. 2. Identify the spontaneity of a process based on entropy. Substance S° (J/K-mol) Fe 27.3 What you need: Pen and paper. O2 205 Fe2O3 87.4 PART A Cao 39.8 What to do: From the table of the standard entropy values, calculate the standard entropy changes for the following reactions at 25°C. Write your answers in a separate sheet of paper. Co2 213.6 CaCO3 92.9 1. СаСО, > Са),, + СО,де 2. Nze +3H% 3(s) (s) NH3 193 →2NH, 2(g) 3(g) N2 192 PART B H2 131 What to do: Identify whether the entropy change of the system in each of the following reactions is positive or negative. Write your answers in a separate sheet of paper. HCI 187 Cl2 223 +Oe →2H,0 2. NH,CI, → NH + HCI 1. 2H 2(g) 2(g) 3(g) (g)
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