9C chemistry 2nd midterm review 1 | Baamboozle - Baamboozle

For a reaction of X +Y -------> Z, which curve indicates the reactants and which curve shows the products?

Blue curve(products), red curve(reactants)

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If the sign of enthalpy change is NEGATIVE, the reaction is ___________.

exothermic

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A reaction that absorbs energy from the surroundings is an ___________ reaction.

endothermic

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lifesaver

Give 25 points!

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seesaw

Swap points!

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rocket

Go to first place!

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thief

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This is an energy profile diagram. Number(2) indicates the _______ _________ and number(3) indicates the _____ ________.

activation energy, enthalpy change

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How does a catalyst increase the rate of a reaction?

by lowering the activation energy.

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A _____________ is a substance that changes the rate of a chemical reaction and is chemically unchanged at the end of the reaction.

catalyst

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The heat energy change in chemical reactions is called ______________ change.

enthalpy

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baam

Lose 20 points!

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star

Double points!

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shark

Other team loses 5 points!

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thief

Give points!

Which reaction might have been performed: i) at a higher temperature with dilute reactants? ii)used the greatest amount of reactants? iii)used the dilute reactants?

i)B ii)A iii)C

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In an exothermic reaction, the energy released on forming new bonds is _____________ than that needed to break the old bonds.

greater

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The graph shows a reaction between magnesium and HCl solution in a beaker. Reactants are measured. Which curve is performed at a higher temperature?

curve B

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banana

Go to last place!

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rocket

Go to first place!

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fairy

Take points!

baam

Lose 20 points!

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The minimum amount of energy required for a reaction to occur is called the __________ __________.

activation energy

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What type of reaction is shown by the energy profile diagram?

exothermic reaction

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When the temperature is increased, the chemical reaction time is ___________.

shortened/decreased

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