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klasskru [66]
4 years ago
14

Classify each of the following as an exothermic or an endothermic reaction:

Chemistry
2 answers:
ira [324]4 years ago
6 0
Equation a. C3H8(g) + O2(g) → CO2(g) + H2O(g) + 2220 kj
is endothermic. + 2220 kj
Equation b. 2 Na(s) + Cl2(g) → 2 NaCl(s) + 819kJ
is also endothermic since the overall energy change is positive. + 819kJ
The equation c. PCl5(g) + 67kj → PCl3(g) + Cl2(g) is endothermic since it requires anergy to proceed.
BigorU [14]4 years ago
5 0

Answer:

Reaction A) is exothermic

Reaction B) is exothermic

Reaction C) is endothermic.

Explanation:

Hi, by definition an exothermic reaction is the one that generates heat as it occurs. An endothermic reaction on the other hand, consumes heat from the environment as it happens.

<u>This can be seen, when energy is put as a reactant in the equation. When it appears as a procuct the reaction is exothermic.</u>

Being all that said:

  • Reaction A) is exothermic
  • Reaction B) is exothermic
  • Reaction C) is endothermic.
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Read 2 more answers
8. If 134 L of Nitrogen gas at STP is combined with 99 L of Chlorine gas at STP,
Blizzard [7]

Answer:

Cl₂ is the limiting reactant.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

N₂ + 3Cl₂ —> 2NCl₃

From the balanced equation above,

1 L of N₂ reacted with 3 L of Cl₂.

Finally, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above,

1 L of N₂ reacted with 3 L of Cl₂.

Therefore, 134 L of N₂ will react with = 134 × 3 = 402 L of Cl₂.

From the calculation made above, we can see that a higher volume (i.e 402 L) of Cl₂ than what was given (i.e 99 L) is needed to react completely with 134 L of N₂.

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