Imagine that you fill a bucket to the top with water and then place the bucket outside in freezing weather. Which of the followi
1 answer:
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<u>Answer:</u>
<u>For a:</u> The balanced chemical equation is written below.
<u>For b:</u> The corrosion of iron pipe will take place in the presence of zinc.
<u>For c:</u> Zinc will not protect iron pipe from corrosion.
<u>Explanation:</u>
- <u>For a:</u>
The given half reaction follows:
The substance having highest positive potential will always get reduced and will undergo reduction reaction. Here, zinc will undergo reduction reaction will get reduced.
<u>Oxidation half reaction:</u>
<u>Reduction half reaction:</u>
The balanced chemical equation follows:
- <u>For b:</u>
For a reaction to be spontaneous (thermodynamically feasible) , the standard electrode potential must be positive.
To calculate the of the reaction, we use the equation:
Substance getting oxidized always act as anode and the one getting reduced always act as cathode.
Calculating the using above equation, we get:
As, the EMF is coming out to be positive, the reaction will be thermodynamically feasible and corrosion of iron pipe will take place in the presence of zinc.
- <u>For c:</u>
As, the EMF of the cell is positive, the zinc will not protect the iron pipe from corrosion and the reaction will take place.
Answer:
6.1×10^4Pa or 61KPa
Explanation:
The Clausius-Clapeyron equation is used to estimate the vapour pressure at different temperature, once the enthalpy of vaporization and the vapor pressure at another temperature is given in the question. The detailed solution is shown in the image attached. The temperatures were converted to kelvin and the energy value was converted from kilojoule to joule since the value of the gas constant was given in unit of joule per mole per kelvin. The fact that lnx=2.303logx was also applied in the solution.
