A positive ΔH means that:

In order for the reaction to happen, heat must be input. It is endothermic.

In order for the reaction to happen, heat must be input. It is exothermic

When the reaction happens, heat is released. It is exothermic

When the reaction happens, heat is released. It is endothermic

If object A is larger than object B, but both are the same temperature.

Object A & B have same amount of heat

If object A molecules are moving faster than molecule B, but they have the same amount of total heat

Object A have higher temperature than B

Object A have lower temperature than B

Objects A & B have the same temperature

There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?

All three are the same temperature so they have the same thermal energy

Which of the following best describes an exothermic reaction?

B) A reaction that releases heat to the surroundings

A) A reaction that absorbs heat from the surroundings

C) A reaction that requires light to proceed

D) A reaction that occurs only at high temperatures

In a calorimetry experiment, if the temperature of the water increases, what can be inferred about the reaction?

C) The reaction is at equilibrium

D) The reaction does not involve heat exchange

What is the standard enthalpy change of formation for a compound?

A) The heat change when one mole of a compound is formed from its elements in their standard states

B) The heat change when one mole of a compound is dissolved in water

C) The heat change when one mole of a compound is burned in oxygen

D) The heat change when one mole of a compound is broken down into its elements

Which of the following is a real-world application of thermochemistry?

A) Designing energy-efficient engines

B) Developing new colors for paints

D) Studying the behavior of gases under pressure

In the reaction $$\text{C(s) + O}_2\text{(g) → CO}_2\text{(g)}$$ , what is the sign of the enthalpy change (ΔH)?

B) Negative, because the reaction releases heat

A) Positive, because the reaction absorbs heat

C) Zero, because there is no heat change

D) Cannot be determined without more information

Introduction to Thermochemistry Quiz

25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

When a chemical reaction happens and it feels cold, it is an

Endothermic rxn

Exothermic rxn

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

2.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

Heat flows from _ to objects

cooler to warmer

warmer to warmer

warmer to cooler

cooler to cooler

Tags

NGSS.HS-PS3-4

3.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

Temperature is a measure of the...

total energy in a substance

heat in a substance

average potential energy in a substance

average kinetic energy of molecules in a substance

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-2

4.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

The first law of thermodynamics states that energy is

created

destroyed

conserved

created and destroyed

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Twenty tortilla chips are combusted in a bomb calorimeter surrounded by 5 liters of water. The temperature of the water increases from 30℃ to 35℃. Assuming the heat capacity of the water is about 4 J/g∙ ℃ and the heat capacity of the calorimeter 2000 J/℃, what is the energy content of a single tortilla chip?

100 kJ

110 kJ

5.5 kJ

5 kJ

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

Electrical equation

Heat equation

Thermochemical equation

Tags

NGSS.HS-PS1-4

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What type of reaction is this?

Exothermic

Endothermic

Kinetic

Potential

Tags

NGSS.HS-PS1-4

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Introduction to Thermochemistry

When a chemical reaction happens and it feels cold, it is an

Heat flows from _ to objects

Temperature is a measure of the...

The first law of thermodynamics states that energy is

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

What type of reaction is this?

the study of energy changes that occur during chemical reactions and changes in state

ΔH is the same thing as:

If the enthalpy ter (ΔH) is negative the reaction is ____.

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

Introduction to Thermochemistry

When a chemical reaction happens and it feels cold, it is an

Heat flows from _______ to ______ objects

Temperature is a measure of the...

The first law of thermodynamics states that energy is

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

What type of reaction is this?

the study of energy changes that occur during chemical reactions and changes in state

ΔH is the same thing as:

If the enthalpy ter (ΔH) is negative the reaction is ____.

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

Heat flows from _ to objects

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