Chemical Energetics

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False

During an endothermic reaction, the temperature rises. True/False

False

Exothermic reactions are always fast. True / False

False

Exothermic reactions only involve bond making. True/ False

Rise

An exothermic reaction is indicated by a RISE or a FALL in temperature

True

Condensation is exothermic. True/ False

True

During neutralization heat is lost to the surroundings. True/False

False

Endothermic reactions are always slow. True / False

False

Freezing is an endothermic process. True/False

Positive

In an endothermic process, is the enthalpy change (ΔH) positive or negative

Greater

In an endothermic reaction, is the enthalpy of the products greater or lower than the reactants

False

In an endothermic reaction, there are always more bonds broken than formed. True or False?

energy absorbed during bond breaking

In an endothermic reaction, which is greater - energy absorbed during bond breaking OR energy released during bond forming

False

In an exothermic process, heat enters the system. True/False

Negative

In an exothermic process, is the enthalpy change (ΔH) positive or negative

False

In an exothermic reaction, there are always more bonds formed than broken. True or False

Endothermic

In which type of process (exothermic OR endothermic), does heat enter the system

Exothermic

In which type of reaction (exothermic OR endothermic), is the enthalpy of the products lower than the reactants

Endothermic

Is bond breaking exothermic or endothermic?

Endothermic

Is photosynthesis exothermic OR endothermic

Exothermic

Is respiration exothermic OR endothermic

exothermic; all combustion reactions are exothermic

Is the combustion of ethanol an exothermic or endothermic process

endothermic; the process is photosynthesis

Is the formation of a carbohydrate and oxygen from carbon dioxide and water an endothermic or exothermic process?

exothermic; the process is combustion

Is the oxidation of carbon to carbon dioxide an endothermic or exothermic process

positive

When ammonium chloride is dissolved in water, the temperature of the solution falls. Hence is ΔH for the process positive OR negative?

False

When bonds are formed, energy is absorbed from the surroundings. True/ False

positive

When ice melts, is the enthalpy change (ΔH) positive OR negative

positive

When iodine sublimes, is the enthalpy change positive or negative

Endothermic

When steam is passed through white hot coke, the temperature of the coke falls. Is the reaction exothermic OR endothermic

True

ΔH for combustion reactions are negative. True/False


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