Which of the following statements is true?
a. in general, the solubility of a solid in water decreases with increasing temperature.
b. in general, the solubility of a gas in water decreases with increasing temperature.
c. the solubility of a gas in water usually increases with decreasing pressure.
d. the solubility of an ionic solid in water decreases with increasing temperature.

Option (b) is the correct answer.

Explanation:

The solubility of a gas is dependent on both pressure and temperature. When we increase the temperature for a gas, then its molecules tend to gain more kinetic energy.

Hence, there occurs more number of collisions between the gas molecules. As a result, intermolecular bonds tend to break down and the molecules of gas become able to escape out of the solution.

Whereas when we increase the pressure on a gas then its molecules come closer to each other. Due to which there will be more number of collisions will take place. Therefore, solubility of a gas increases with increase in pressure.

Thus, we can conclude that the statement in general, the solubility of a gas in water decreases with increasing temperature, is true.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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