enthalpy changes Flashcards
1
Q
calorimetry, reactions
A
put the polystyrene cup in into a beaker with cotton wool
and before that put the reactants into a water bath at 25 c
take temperature every 30 seconds
2
Q
combustion reaction apparatus
A
draught excluder, lid. copper can and and spirit burner
3
Q
enthalpy change
A
Q = M X C X T
M mass of water
C specific heat capacity
4
Q
exothermic reaction
A
energy released from the bonds is greater than then energy needed to break them
5
Q
enthalpy change
A
energy used to break bonds- energy released to make bonds.
