Answer
Decrease
Explanation:
As surface area will also increase the particles are less likely to collide on a regular basis.
Answer:
H2S.
Explanation:
That would be H2S, hydrogen sulphide. (Smells like bad eggs!).
Answer: 2.8 moles of copper (Il) sulfide
will be produced from 2.8 moles of sulphur.
Explanation:
The balanced chemical reaction is:
According to stoichiometry :
1 mole of
produce = 1 mole of copper (Il) sulfide
Thus 2.8 moles of
will produce=
of copper (Il) sulfide 
Thus 2.8 moles of copper (Il) sulfide
will be produced from 2.8 moles of sulphur.
This is equivalent to having a standard enthalpy change of reaction equal to 10.611 kJ
<u>Explanation</u>:
The standard enthalpy change of reaction, Δ
H
∘
, is given to you in kilojoules per mole, which means that it corresponds to the formation of one mole of carbon dioxide.
C
(s] + O
2(g]
→
CO
2(g]
Remember, a negative enthalpy change of reaction tells you that heat is being given off, i.e. the reaction is exothermic.
First to convert grams of carbon into moles,
use carbon's molar mass(12.011 g).
Moles of C = mass in gram / molar mass
= 0.327 g / 12.011 g
Moles of C = 0.027 moles
Now, in order to determine how much heat is released by burning of 0.027 moles of carbon to form carbon-dioxide.
= 0.027 moles C
393 kJ
Heat released = 10.611 kJ.
So, when 0.027 moles of carbon react with enough oxygen gas, the reaction will give off 10.611 kJ of heat.
This is equivalent to having a standard enthalpy change of reaction equal to 10.611 kJ