Answer:
To avoid variation due to concentration
Explanation:
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Answer:
50 Joule
Explanation:
Diatomic gas
Q = Heat given = 70 J
n = number of moles
Cp = specific heat at constant pressure
ΔT = Change in temperature
R = Gas constant
Change in energy
ΔE = Q-w
⇒ΔE = n(Cp)ΔT-nRΔT
As it is a diatomic gas Cp = (7/2)R
Putting the value of Cp in the above equation we get
Q = (7/2)RΔT
ΔE = (5/2)RΔT
Dividing the equations we get
ΔE/Q = 5/7
⇒ΔE = (5/7)Q
⇒ΔE = (5/7)×70
⇒ΔE = 50 J
∴ The internal energy change is 50 Joule
N2 + 2O2 --> 2NO2
This is correct because you now have the same number of each element. Two Nitrogen, on the left side. So we made two on the right side. But after adding the second to the right side we then had 4 Oxygen on the right side. So we balanced the equation by adding an Oxygen to the left.
Silver Chromate (Ag₂CrO₄) is sparingly soluble in water. It has a solubility product of Ksp = 1.2 × 10⁻¹². When added to water Silver Chromate produces Silver and chromate ions as shown below,
Ag₂CrO₄ ₍s₎ ⇄ 2 Ag⁺ ₍aq₎ + CrO₄²⁻ ₍aq₎