Question

question 3 of 10 > points possible: 1.00 at a certain temperature, the total pressure (p_total) inside the flask is measured to be 115 kpa. the pressure of the air (p_air) at that temperature is calculated to be 105 kpa. what is the vapor pressure of the ethanol (p_vap) at the same temperature? select one: 1.10 kpa 220 kpa 115 kpa 10 kpa

Explanation:

Step1: Recall Dalton's law of partial pressures

$P_{total}=P_{air}+P_{vap}$

Step2: Rearrange the formula to solve for $P_{vap}$

$P_{vap}=P_{total}-P_{air}$

Step3: Substitute given values

$P_{total} = 115$ kPa, $P_{air}=105$ kPa. So $P_{vap}=115 - 105=10$ kPa

Answer:

10 kPa