In an endothermic reaction, where is the energy term (kJ) written in the chemical equation?

It is not included in the equation

Which of the following reactions is endothermic?

CaCO₃(s) + 176 kJ → CaO(s) + CO₂(g)

C(s) + O₂(g) → CO₂(g) + 393.51 kJ

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l) + 890.31 kJ

What do reaction diagrams show?

The amount of energy at any given time during a reaction.

The temperature changes during a reaction.

The colour changes during a reaction.

Which of the following is represented by the peak of the curve in a reaction diagram?

The initial energy of the reactants.

The final energy of the products.

In a reaction diagram, what does ΔH represent?

The initial energy of the reactants.

The final energy of the products.

In an exothermic reaction, how does the energy of the products compare to the energy of the reactants?

B) The energy of the products is lower.

A) The energy of the products is higher.

C) The energy of the products is the same.

D) The energy of the products fluctuates.

In an endothermic reaction, how does the energy of the products compare to the energy of the reactants?

A) The energy of the products is higher.

B) The energy of the products is lower.

C) The energy of the products is the same.

D) The energy of the products fluctuates.

What is the heat of formation (ΔHf) used to calculate?

The enthalpy change (ΔH) of a reaction

Which formula represents the calculation of the enthalpy change (ΔH) of a reaction using the heat of formation (ΔHf)?

ΔH = ΔHf,products - ΔHf,reactants

ΔH = ΔHf,reactants - ΔHf,products

ΔH = ΔHf,products + ΔHf,reactants

ΔH = ΔHf,reactants + ΔHf,products

How can enthalpy (ΔH) be determined?

A) By comparing energy added and energy released

B) By measuring temperature change

C) By calculating pressure difference

What is the formula for enthalpy (ΔH)?

B) ΔH = bonds broken - bonds formed

A) ΔH = bonds formed - bonds broken

C) ΔH = Bond Energy products - Bond Energy reactants

D) ΔH = Bond Energy reactants + Bond Energy products

Enthalpy of Chemical Reactions

Authored by Peter Blanch

Chemistry

11th Grade

Used 2+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is always associated with chemical reactions?

Change in colour

Change in energy

Change in state

Change in mass

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In what forms can the change in energy during a chemical reaction be observed?

Heat, light, or sound

Colour, mass, or volume

Temperature, pressure, or density

Shape, size, or texture

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a thermochemical equation include?

The mass of reactants

The heat change in the reaction

The volume of the reactants

The pressure of the reaction

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the given thermochemical equation, what is the heat change?

$A) 1367 kJ$

$B) 1267 kJ$

$C) 1467 kJ$

$D) 1567 kJ$

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a product in the given thermochemical equation?

$A) C₂H₅OH(l)$

$B) O₂(g)$

$C) CO₂(g)$

$D) H₂(g)$

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of reaction is represented by the equation: $C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l) + 1367 kJ$ ?

Endothermic

Exothermic

Neutralisation

Decomposition

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an exothermic reaction, where is the energy written in the chemical equation?

On the reactants side

On the products side

In the middle of the equation

It is not written in the equation

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Enthalpy of Chemical Reactions

What is always associated with chemical reactions?

In what forms can the change in energy during a chemical reaction be observed?

What does a thermochemical equation include?

In the given thermochemical equation, what is the heat change?

Which of the following is a product in the given thermochemical equation?

What type of reaction is represented by the equation: $C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l) + 1367 kJ$ ?

In an exothermic reaction, where is the energy written in the chemical equation?

What is produced in an exothermic reaction?

What type of reaction is represented by the equation: 2NaHCO₃(s) + 129 kJ → 2Na₂CO₃(s) + H₂O(g) + CO₂(g)?

In an endothermic reaction, where is the energy term (kJ) written in the chemical equation?

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Enthalpy of Chemical Reactions

What is always associated with chemical reactions?

In what forms can the change in energy during a chemical reaction be observed?

What does a thermochemical equation include?

In the given thermochemical equation, what is the heat change?

Which of the following is a product in the given thermochemical equation?

What type of reaction is represented by the equation: C2H5OH(l)+3O2(g)→2CO2(g)+3H2O(l)+1367kJC₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l) + 1367 kJC2​H5​OH(l)+3O2​(g)→2CO2​(g)+3H2​O(l)+1367kJ ?

In an exothermic reaction, where is the energy written in the chemical equation?

What is produced in an exothermic reaction?

What type of reaction is represented by the equation: 2NaHCO₃(s) + 129 kJ → 2Na₂CO₃(s) + H₂O(g) + CO₂(g)?

In an endothermic reaction, where is the energy term (kJ) written in the chemical equation?

Access all questions and much more by creating a free account

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Popular Resources on Wayground

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What type of reaction is represented by the equation: $C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l) + 1367 kJ$ ?