On a potential energy diagram for an endothermic reaction,

the potential energy of the reactants is less than the potential energy of the products

the potential energy of the reactants is greater than the potential energy of the products

the potential energy of the reactants is equal to the potential energy of the products

To determine molar enthalpy, what data must be collected?

Mass of solid, initial temperature of the water and final temperature of the water

Mass of solid, mass of water, initial temperature of the water and final temperature of the water

Mass of water, initial temperature of the water and final temperature of the water

Mass of solid, mass of water, initial temperature of the water and final temperature of the water and pressure

In general, the enthalpy of vaporization is _____________ than the enthalpy of fusion because _________

greater than, IMF are fully overcome

less than, IMF are fully overcome

Using bond energies to solve for enthalpy,

Δ H \Delta H Δ H = Bond broken - bonds formed

\Delta H Δ H = Bond formed- bonds broken

\Delta H Δ H = products - reactants

\Delta H Δ H = reactants- products

If a reaction is exothermic,

the sum of the bond energies of the reactants < the sum of the bond energies of the products

the sum of the bond energies of the reactants > the sum of the bond energies of the products

If a reaction is endothermic,

the energy required to break the bonds in the reactants is > the energy required to form the bonds in the reactants is

the energy required to break the bonds in the reactants is < the energy required to form the bonds in the reactants is

If Δ H < 0 \Delta H\ <\ 0 Δ H < 0 ,

the energy required to break the bonds in the reactants is < the energy required to form the bonds in the reactants is

the energy required to break the bonds in the reactants is > the energy required to form the bonds in the reactants is

When finding the enthalpy change from enthalpies of formation, the formula is...

Δ H = ∑ Δ H p r o d u c t s − ∑ Δ H r e a c tan ⁡ t s \Delta H\ =\ \sum_{ }^{ }\Delta H_{products\ }-\ \sum_{ }^{ }\Delta H_{reac\tan ts\ } Δ H = ∑ Δ H p r o d u c t s − ∑ Δ H r e a c tan t s

Δ H = ∑ Δ H r e a c tan ⁡ t s − ∑ Δ H p r o d u c t s \Delta H\ =\ \sum_{ }^{ }\Delta H_{reac\tan ts\ }-\ \sum_{ }^{ }\Delta H_{products\ } Δ H = ∑ Δ H r e a c tan t s − ∑ Δ H p r o d u c t s

When calculating enthalpy change from enthalpy of formation,

multiply the H f for each compound by the coefficient

multiply the H f for each compound by the subscript

Unit 6 AP Chemistry

Authored by Emily Hart

Chemistry

10th Grade

NGSS covered

Used 91+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Endothermic

absorb energy

release energy

Tags

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Exothermic

absorb energy

release energy

Tags

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a substance goes from a liquid to a gas, the process is

endothermic, heat is transferred from the surrounding to the liquid

endothermic, heat is transferred from the liquid to the surrounding

exothermic, heat is transferred from the surrounding to the liquid

exothermic, heat is transferred from the liquid to the surrounding

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The freezing of water would be considered...

endothermic, heat is being absorbed

endothermic, heat is being released

exothermic, heat is being absorbed

exothermic, heat is being released

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the dissolution process, the increase in separation between ions in the solute is

endothermic

exothermic

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the dissolution process, the increase in separation between solvent molecules is

endothermic

exothermic

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the dissolution process, the step where the ions inserting into the spaces in the polar solvent is

endothermic

exothermic

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

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Unit 6 AP Chemistry

Endothermic

Exothermic

If a substance goes from a liquid to a gas, the process is

The freezing of water would be considered...

In the dissolution process, the increase in separation between ions in the solute is

In the dissolution process, the increase in separation between solvent molecules is

In the dissolution process, the step where the ions inserting into the spaces in the polar solvent is

In a system, the energy lost by the reacting species must be ________________ the energy gained by the surrouding

When an atom loses an electron, the process is

When a bond is broken, the process is

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