The heat absorbed when 1 mol of CS₂(g) forms from its elements at these conditions is 117.4 kJ.
Given,
Number of moles CS₂ = 1 mol
Temperature = 25° = 273 +25 = 298 Kelvin
Heat absorbed = 89.7 kJ
It takes 27.7 kJ to vaporize 1 mol of the liquid
Calculate the heat absorbed:
C(s) + 2S(s) → CS₂(l) ΔH = 89.7 kJ (positive since heat is absorbed)
CS₂(l) → CS₂g) ΔH = 27.7 kJ (positive since heat is absorbed)
Prior to summing, the equations should be balanced; however, because they are balanced already, there is nothing further we need to do.
C(s) + 2S(s)---> CS₂ (g)
ΔH = 89.7 + 27.7 = 117.4 kJ
Hence, the heat absorbed is 117.4 kJ.
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It's Bromine(Br-) Group 17 element that has 7 valence electrons on the fourth energy level.
Answer:
a) Change in internal energy of the system = - 135.2 J
b) Change in internal energy of the environment = 135.2 J
Explanation:
From the mathematical statement of the first law of thermodynamics,
ΔU = Q - W
ΔU = Change in internal energy of the system = ?
Q = heat transferred into or out of the system. For this system, heat is transferred into it, Q = 77.8 J
W = workdone = 213 J (positive because work is done by the system on the environment)
ΔU = 77.8 - 213 = - 135.2 J
The change in internal energy of the environment is just the negative of that of the system. The balance is always so.
Hence, change in internal energy of the environment = -(- 135.2) = 135.2 J
Answer:
This sounds like a "solid."
Explanation:
Solids, are essentially molecular packed tightly together that have their own set volume.
Answer:
energy story for lactic acid fermentation
Explanation:
the reactants are pyruvate NADH and proton
