Enthalpy - Assessment

1.

Multiple Choice

30 sec

1 pt

Define enthalpy.

The opposite of temperature

The temperature of molecule

The energy stored in the movements of the molecules

The internal energy and the product of pressure and wave

2.

Multiple Choice

30 sec

1 pt

What is the Law of Conservation of Energy?

Energy is equal to reactants and products

Energy can be created nor destroyed

Energy is used up but it can be replenish

Energy is conserved and preserved

3.

Multiple Choice

30 sec

1 pt

A process where the system absorbs heat from the surroundings.

Exothermic Reaction

Endothermic Reaction

Enthalpy

Entropy

4.

Multiple Choice

30 sec

1 pt

Study the reaction below. Is it exothermic or endothermic?

H₂ + Cl₂ --> 2 HCl + 1845 kJ

Exothermic Reaction

Endothermic Reaction

5.

Multiple Choice

30 sec

1 pt

How do you calculate the Enthalpy of Reaction?

ΔH = ΔH_products- ΔH_reactants

ΔG = ΔH -TΔS

ΔT = q / mC

E = mc²

6.

Multiple Choice

30 sec

1 pt

A solute dissolves in water and gets cold.

Exothermic with positive ΔH

Exothermic with negative ΔH

Endothermic with positive ΔH

Endothermic with negative ΔH

7.

Multiple Choice

30 sec

1 pt

The SI unit of energy.

Calorie

calorie

Joules

enthalpy

8.

Multiple Choice

30 sec

1 pt

ΔH value in an endothermic reaction is negative.

True

False

9.

Multiple Choice

30 sec

1 pt

According to the Particles Theory of Matter, one particle has the ability to vibrate within their mean position if added with heat. Which of the following is the statement referring to?

Solid

Liquid

Gas

10.

Multiple Choice

30 sec

1 pt

H₂ + ½ O₂ --> H₂O + 285kJ is an example of a(n)

Electrical equation

Thermodynamical equation

Thermochemical equation

11.

Multiple Choice

30 sec

1 pt

Exothermic reactions feel ____.

warm

cold

12.

Multiple Choice

30 sec

1 pt

A reaction that gives out energy to the surroundings is ____.

Exothermic reaction

Endothermic reaction

Electrical reaction

None of the above

13.

Multiple Choice

30 sec

1 pt

A reaction which causes the temperature of the surroundings to drop.

Exothermic reaction

Endothermic reaction

Electrical reaction

None of the above

14.

Multiple Choice

30 sec

1 pt

It is the study of energy, its different forms, and patterns of change.

Thermochemistry

Enthalpies

Thermochemical equation

Thermodynamics

15.

Multiple Choice

30 sec

1 pt

A balanced equation showing the associated enthalpy change.

Thermochemistry

Enthalpy

Thermochemical equation

Thermodynamics

16.

Multiple Choice

30 sec

1 pt

1 Calorie is equal to ______ calories.

10

100

1000

10000

17.

Multiple Choice

30 sec

1 pt

Systemsincludes _______.

reactants

products

both reactants and products

None of the above

18.

Multiple Choice

30 sec

1 pt

Endothermic:_________:__________

Exothermic:_________:__________

positive:warm

negative:cold

positive:warm

negative:warm

positive:cold

negative:cold

positive:cold

negative:warm

19.

Multiple Choice

30 sec

1 pt

Change in enthalpy is also called as _______.

Systematic Reaction

Balanced Reaction

Energy of Reaction

Heat of Reaction

20.

Multiple Choice

30 sec

1 pt

$H_{final}$ > $H_{initial}$ means _____

change of enthalpy is positive and system absorbs heat

change of enthalpy is negative and system absorbs heat

change of enthalpy is positive and system loses heat

change of enthalpy is negative and system loses heat

21.

Open Ended

5 mins

1 pt

Explain this graph for 10 points.

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