UNIT 5 APPLIED SCIENCE LEVEL 3 BTEC CHEMISTRY EXAM WITH QUIZ & ANS
(100% SOLVED)
chemical energy - ✔✔✔–the energy required to break or make bonds
exothermic reaction - ✔✔✔–A reaction that releases more energy in the form of heat
what is the enthalpy change of an exothermic reaction - ✔✔✔–negative
endothermic reaction - ✔✔✔–A reaction in which more energy is absorbed
what is the enthalpy charge of an endothermic reaction - ✔✔✔–positive
what will happen to the enthalpy diagrams when a catalyst is added - ✔✔✔–less activation
energy will be required during this reaction
enthalpy change - ✔✔✔–the change n eat energy at a constant pressure
Enthalpy change of formation - ✔✔✔–when one mole of a compound is formed from its
element under standard conditions
enthalpy change of combustion - ✔✔✔–when one mole of a substance is burnt in oxygen under
standard conditions
enthalpy change of hydration - ✔✔✔–when one mole of a gaseous ion are dissolved in water to
make an infinite dilute solution
what are the three standard conditions - ✔✔✔–temperature
concentration
pressure
, UNIT 5 APPLIED SCIENCE LEVEL 3 BTEC CHEMISTRY EXAM WITH QUIZ & ANS
(100% SOLVED)
what are the units for the three standard conditions - ✔✔✔–temperature- 298k
concentration- 1mol dm-3
pressure- 100kpa
what is the equation for enthalpy change - ✔✔✔–change in internal energy + pressure x change
in value
how o you convert Celsius to kelvin - ✔✔✔–+ 273
What is a catalyst? - ✔✔✔–a substance that speeds up the rate of reaction by decreasing the
activation energy needed for the reaction, so it provides the reaction with an alternate pathway.
the catalyst is never used up throughout the reaction
What is Hess's Law? - ✔✔✔–The total enthalpy change of a reaction is independent of the
route taken.
What is lattice energy? - ✔✔✔–the energy required to make one mole of an ionic lattice
what is the homologous series? - ✔✔✔–A group of chemicals that react in a similar way
because they have the same functional group
what type of bond is an alkane? - ✔✔✔–single
what type of bond is an alkene? - ✔✔✔–Double
what type of bond is an alkyne - ✔✔✔–Tripple
(100% SOLVED)
chemical energy - ✔✔✔–the energy required to break or make bonds
exothermic reaction - ✔✔✔–A reaction that releases more energy in the form of heat
what is the enthalpy change of an exothermic reaction - ✔✔✔–negative
endothermic reaction - ✔✔✔–A reaction in which more energy is absorbed
what is the enthalpy charge of an endothermic reaction - ✔✔✔–positive
what will happen to the enthalpy diagrams when a catalyst is added - ✔✔✔–less activation
energy will be required during this reaction
enthalpy change - ✔✔✔–the change n eat energy at a constant pressure
Enthalpy change of formation - ✔✔✔–when one mole of a compound is formed from its
element under standard conditions
enthalpy change of combustion - ✔✔✔–when one mole of a substance is burnt in oxygen under
standard conditions
enthalpy change of hydration - ✔✔✔–when one mole of a gaseous ion are dissolved in water to
make an infinite dilute solution
what are the three standard conditions - ✔✔✔–temperature
concentration
pressure
, UNIT 5 APPLIED SCIENCE LEVEL 3 BTEC CHEMISTRY EXAM WITH QUIZ & ANS
(100% SOLVED)
what are the units for the three standard conditions - ✔✔✔–temperature- 298k
concentration- 1mol dm-3
pressure- 100kpa
what is the equation for enthalpy change - ✔✔✔–change in internal energy + pressure x change
in value
how o you convert Celsius to kelvin - ✔✔✔–+ 273
What is a catalyst? - ✔✔✔–a substance that speeds up the rate of reaction by decreasing the
activation energy needed for the reaction, so it provides the reaction with an alternate pathway.
the catalyst is never used up throughout the reaction
What is Hess's Law? - ✔✔✔–The total enthalpy change of a reaction is independent of the
route taken.
What is lattice energy? - ✔✔✔–the energy required to make one mole of an ionic lattice
what is the homologous series? - ✔✔✔–A group of chemicals that react in a similar way
because they have the same functional group
what type of bond is an alkane? - ✔✔✔–single
what type of bond is an alkene? - ✔✔✔–Double
what type of bond is an alkyne - ✔✔✔–Tripple
