The solubility of N2 in water at a particular temperature and at a N2 pressure of 1 atm is 6.8 × 10–4 mol L–1. Calculate the con
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Answer:
8,19 L
Explanation:
The combined gas law is a equation that can be used <em>when the initial and final conditions -</em>pressure,volume,amount of moles,temperature-, <em>of a gas change</em> during a process. It can be written:
If the amount of the gas remains constant, then n1=n2 and we have:
For the problem we have:
<em>Note: When working with gases is important to use </em><em><u>absolute temperature values (°K, °K=°C+273,15):</u></em>
P1=1 atm, V1=2,5L, T1=25+273,15=298,15°K
P2=0,3 atm, V2=?, T2=20+273,15=293,15°K
The new volume of the balloon is 8,19 L.
Answer : The voltage of the voltaic cell is 1.14 V
Explanation :
From the given cell representation, we conclude that
The copper will undergo reduction reaction will get reduced. Zinc will undergo oxidation reaction and will get oxidized.
The oxidation-reduction half cell reaction will be,
Oxidation half reaction:
Reduction half reaction:
Oxidation reaction occurs at anode and reduction reaction occurs at cathode. That means, gold shows reduction and occurs at cathode and chromium shows oxidation and occurs at anode.
The overall balanced equation of the cell is,
To calculate the of the reaction, we use the equation:
Putting values in above equation, we get:
Now we have to calculate the emf or voltage of the cell.
Using Nernest equation at 298 K :
where,
n = number of electrons in oxidation-reduction reaction = 2
= ?
Now put all the given values in the above equation, we get:
Therefore, the voltage of the voltaic cell is 1.14 V