Answer:
ΔH = -22 kcal
Step-by-step explanation:
N₂(g) + 3H₂(g) ⇌ 2NH₃(g) + 22 000 cal
Energy is on the right-hand side of the equation, so it is being <em>released</em> by the system.
The thermodynamic convention is that <em>energy going out of a system is negative.</em> Thus,
ΔH = -22 000 cal Convert to kilocalories
ΔH = -22 kcal
A and B are both wrong, because you divide by 1000 to convert calories to kilocalories.
C is wrong, because the sign must be negative for an exothermic reaction.
Answer:
Explanation:
Hello!
In this case, since the formation of ammonia by starting with nitrogen and therefore hydrogen is:
Which has an energy of reaction of:
We can compute the energy required for this reaction by first computing the moles of ammonia yielded by 21.7 grams of nitrogen (28.02 g/mol) via stoichiometry:
Thus, the energy turns out:
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Answer : 1.12 grams
Yo find the mass of the sample, you take the increased mass and subtract the original mass.
6.130 - 5.010 = 1.12
Answer:
An emulsion is formed.
Explanation:
An association (emulsion) of two liquids is formed, in this case oil and vinegar, which when stirred, said mixture will separate.