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3 years ago

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A bird is able to easily soar when it flies over a thermal. A thermal is a current of warm air that is heated by the ground and

rises up into the sky, taking the bird with it. What is this an example of?
A. Conduction
B. Radiation
C. Contusion
D. Convection

1 answer:

Naddik [55]3 years ago

4 0

Answer is Convection

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Answer : The partial pressure of $H_2O$ is 102.3 mmHg.

Explanation :

As per question,

Mass of $H_2O$ = 62.9 g

Mass of $HOCH_2CH_2OH$ = 33.2 g

Molar mass of $H_2O$ = 18 g/mole

Molar mass of $HOCH_2CH_2OH$ = 62 g/mole

First we have to calculate the moles of $H_2O$ and $HOCH_2CH_2OH$ .

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$\text{Moles of }HOCH_2CH_2OH=\frac{\text{Mass of }HOCH_2CH_2OH}{\text{Molar mass of }HOCH_2CH_2OH}=\frac{33.2g}{62g/mole}=0.536mole$

Now we have to calculate the mole fraction of $H_2O$ and $HOCH_2CH_2OH$ .

$\text{Mole fraction of }H_2O=\frac{\text{Moles of }H_2O}{\text{Moles of }H_2O+\text{Moles of }HOCH_2CH_2OH}=\frac{3.49}{3.49+0.536}=0.867$

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Now we have to partial pressure of $H_2O$ .

According to the Raoult's law,

$p^o=X\times p_T$

where,

$p^o$ = partial pressure of water vapor

$p_T$ = total pressure of gas

$X$ = mole fraction of water vapor

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