Answer:
II. The reaction is exothermic.
III. The enthalpy term would be different if the water formed was gaseous.
Explanation:
For the reaction:
C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l)
The ΔH is -1.37×10³ kJ. As the change in enthalpy is <0,<em> II. The reaction is exothermic.</em>
The ΔH formation of a compound is different if the chemical is in liquid or gaseous phase. For that reason: <em>III. The enthalpy term would be different if the water formed was gaseous.</em>
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I hope it helps!
Density is equal to mass divided by volume so the densest object will be the object that has the largest mass in the smallest area.
In this case object A is the densest with a density of 10g/cm^3.
I hope this helps. Let me know if anything is unclear.
Answer:
a) Qc = 0.6338
b) Qc < Kc ⇒ the reaction proceeds to the right, towards the products.
Explanation:
∴ Kc = 9.8 E5 = [H2S] / [H2]
a) reaction quotient, Q:
∴ Qc = [H2S] / [H2] = (0.483 M)/(0.762 M) = 0.6338
b) the process is not established equilibrium: Qc < Kc
⇒ The reaction evolves to the right, towards the products
Answer: It will take 0.50 minutes for it to decompose to 28.2% of its initial value
Explanation:
Integrated rate law for second order kinetics is given by:
a= concentration left after time t = 
k = rate constant =
= initial concentration = 1.77
t= time taken for decomposition
Thus it will take 0.50 minutes for it to decompose to 28.2% of its initial value
Answer:
As frequency increases, energy increases
Explanation:
The energy of electromagnetic waves increases as frequency increases. It is the wavelength that decreases when the energy of electromagnetic waves increases.
We can say a direct relationship exists between frequency and energy of electromagnetic waves.
The high energy waves in an electromagnetic spectrum are x-rays, ultraviolet rays etc. These waves also have a high frequency.
Frequency is the number of waves that passes a particular point per seconds. The more the frequency or the number of waves passing through, the more energy it is able to produce and release.
