Question # 1

The enthalpy of reaction 2H2 +O2-----2H2O

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-571.6 kJ

-110.5 kJ

-393.5 kJ

+53.8 kJ

The enthalpy of reaction C+O2 ------ CO2

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-571.6 kJ

-393.5 kJ

+53.8 kJ

-110.5 kJ

The word energy is used in physics ofr the firt time.

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1902

1858

1805

1802

Which is not produced in an aerobic respiration.

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Carbon dioxide

Lactic acid

Water

Energy

Activation energy of a chemical reaction must be....... the everage kinetic energy of reacting molecules.

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Equal to

Grether than

Lower than

None of these

All chemical reaction involves.

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Enzymes

Catalyst

Energy changes

All of these

Who use the word energy for the 1st time

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Rutherford

Bohr

Thomas Young

None of these

Formation of NO is

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Exothrmic

Endothermic

No Heat Change

None of these

When NaOH and HCl are mixed the temperature increases. The reaction

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Exothermic with a negative enthalpy chagne.

Endothermic with a positive enthaly change.

Endothermic with a negatie enthalpy change

Exothermic with a positive enthealpy change

-------------acts are reserve energy sources.

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Enzymes

Vitamins

Proteins

Lipids

Which is released in anacrobic respiration.

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Stearic acid

Citric acid

Lactic acid

Amino Acid

Bond dissocialation for H2 is

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435 kJ/mol

440 kJ/mol

430 kJ/mol

445 kJ/mol

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