The graph below represents changes in water. What process is occurring during section “B” of the graph?
2 answers:
Explanation :
The graph shows the variation of heat absorbed with temperature. The process takes place in five steps.
Water exists in three forms:
- Solid
- Liquid
- Gas
Section B shows the melting of water. When the solid ice converts into a liquid state the process is called melting. Here, the temperature is constant. The melting point of ice is . It shows that the ice is converting to water (at
).
So, the correct option is (c) " melting ".
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Answer:
The vapor pressure at 60.6°C is 330.89 mmHg
Explanation:
Applying Clausius Clapeyron Equation
Where;
P₂ is the final vapor pressure of benzene = ?
P₁ is the initial vapor pressure of benzene = 40.1 mmHg
T₂ is the final temperature of benzene = 60.6°C = 333.6 K
T₁ is the initial temperature of benzene = 7.6°C = 280.6 K
ΔH is the molar heat of vaporization of benzene = 31.0 kJ/mol
R is gas rate = 8.314 J/mol.k
Therefore, the vapor pressure at 60.6°C is 330.89 mmHg