1) Three factors control the rate of evaporation of a liquid: surface area, temperature, and strengths of intermolecular forces. More than one of the statements given described a correct effect. The statements are (1) the larger the surface area, the faster the rate of evaporation of the liquid, (2) the higher the temperature, the faster the rate of evaporation of the liquid, and (3) the stronger the intermolecular attractive forces, the faster the rate of evaporation of the liquid. Which choices are correct?
a) choices 1 and 2
b) choices 1 and 3
c) choices 2 and 3
d) all three choices are valid and describe a correct effect.
e) none of the three choices describe a correct effect.
I know that I already posted this and the answer was that statement 3 is incorrect but I was not sure if statement 1 was incorrect as well because that is the one that I originally thought was incorrect?
So is only statement 2 correct?
No, both 1 and 2 are correct. Think about what you know.
a. Think about placing water in a cup and placing that on a table. How long will it take to evaporate until the cup is dry? Quite a while, right? But if we take a teaspoon and place the (cup of) water around in drops on the table, floor, counter tops, etc doesn't it evaporate faster? Of course it does BECAUSE you have increased the surface area.
oh ok I understand now, thank you for your help!
To determine which statements are correct, let's analyze each statement one by one:
1) The larger the surface area, the faster the rate of evaporation of the liquid.
This statement is correct. Increasing the surface area of a liquid exposes more molecules to the air, allowing for a faster evaporation rate. So, statement 1 is valid.
2) The higher the temperature, the faster the rate of evaporation of the liquid.
This statement is also correct. Higher temperature increases the kinetic energy of the liquid molecules, causing them to move faster and escape into the air more readily. Therefore, statement 2 is valid.
3) The stronger the intermolecular attractive forces, the faster the rate of evaporation of the liquid.
This statement is incorrect. Stronger intermolecular forces, such as hydrogen bonding, actually decrease the rate of evaporation. These forces hold the molecules together more tightly, making it harder for them to escape into the vapor phase. So, statement 3 is invalid.
Based on the analysis, the correct choices are:
a) choices 1 and 2