df

Question 1

standard enthalpy cahnge do formation

Answer 1

the enthalpy change when one mole of a compound is formed from its elements in standard states under standard conditions

Question 2

standard enthalpy changeof neutralisation

Answer 2

the enthalpy change when one mole of hydrogen ions react with one mole of hydroxide ions to form one mole of water under standard conditions and in solutions containing 1 moldm-3

Question 3

standard enthalpy change of combustion

Answer 3

the enthalpy change that occurs when one mole of a substance is burnt completely in oxygen under standard conditions in standard states

Question 4

aromatic

Answer 4

contains one or more benzene rings

Question 5

aliphatic

Answer 5

do no contain any benzene rings

Question 6

homologous catalysis

Answer 6

reactants and catalyst are in the same physical state

Question 7

heterogeneous catalysis

Answer 7

catalysts and reactants are in different physical states

Question 8

heterogeneous process catalysis

Answer 8

reactants form bonds with atoms in surface of catalyst

reactant’s get adsorbed onto catalyst surface

bonds are weakened

bonds break
new bonds form

weakens bonds to catalyst dirac e
product is released

Question 9

catalyst poison

Answer 9

substance stops catalyst functioning

Question 10

electrophile

Answer 10

a positive ion or a molecule with a partial positive charge that will be attracted to a negatively charged region by accepting a lone pair of electrons to form a covalent bond

Question 11

carbon monoxide removed

Answer 11

co+o2->2co2

Question 12

hydrocarbons removed

Answer 12

produced co2 & water

Question 13

nitrogen monoxide removed

Answer 13

2no+co->n2+2co2

Question 14

catalytic converters

Answer 14

platinum rhodium on a porous support

Question 15

NOx

Answer 15

4NO + 4NH3 + O2 -> 4N2 + 6H2O