Delta H, Delta S, G, W

Delta H, Delta S, G, W

11th - 12th Grade

21 Qs

quiz-placeholder

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Delta H, Delta S, G, W

Delta H, Delta S, G, W

Assessment

Quiz

Chemistry

11th - 12th Grade

Hard

NGSS
HS-PS1-4, HS-PS3-1

Standards-aligned

Created by

Charles Martinez

FREE Resource

21 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which reaction has the greatest decrease in entropy?

2H2 (g) +O2(g) => 2H2O(l)

H2O(g) => H2O(l)

2H2 (g) +O2(g) => 2H2O(g)

H2O(g) => H2O(s)

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

For which of these processes is the value of ΔH expected to be negative?

1. The temperature increases when calcium chloride dissolves in water.

2. Steam condenses to liquid water

3. Water boils

4. Dry ice sublimates

1 and 2 only

3 and 4 only

2 and 3 only

1 only

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What factors determine the spontaneity of a reaction?

enthalpy only

entropy only

enthalpy and entropy

enthalpy, entropy and temperature

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When liquid condenses, what are the signs for Δ H and Δ S ?

Δ H = + Δ S = +

Δ H = - Δ S = -

Δ H = + Δ S = -

Δ H = - Δ S = +

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What signs of Δ H and Δ S will always yield a reaction that is non-spontaneous ? (Think of the equation for ΔG°!!)

Δ H = + Δ S = +

Δ H = - Δ S = -

Δ H = - Δ S = +

Δ H = + Δ S = -

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Predict the signs of Δ H , Δ S and Δ G for the reaction:

Mg(s) → Mg(g)

Δ H= - , Δ S = + and Δ G = - (all temps)

Δ H= + , Δ S = + and Δ G = - (At all temps)

Δ H= + , Δ S = + and Δ G = - (At low temps)

Δ H= + , Δ S = + and Δ G = - (At high temps)

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Calculate ΔH° for the combustion of methane.

CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g)

Given the enthalpies of formation below.

CH4 (g): -50.8 kJ/mol

O2 (g): 0 kJ/mol

CO2 (g): -394.4 kJ/mol

H2O (g): -228.57 kJ/mol

-801kJ/mol

+801kJ/mol

+572kJ/mol

-572kJ/mol

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

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