All categories

3 years ago

1. If 100 mL of a gas, originally at 760 torr, is compressed to a pressure of 120 kPa

Chemistry

1 answer:

marshall27 [118]3 years ago

3 0

Answer : The final volume will be, 84.4 mL

Explanation :

Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.

$P\propto \frac{1}{V}$

or,

$P_1V_1=P_2V_2$

where,

$P_1$ = initial pressure = 760 torr

$P_2$ = final pressure = 120 kPa = 900 torr (1 kPa = 7.5 torr)

$V_1$ = initial volume = 100 mL

$V_2$ = final volume = ?

Now put all the given values in the above equation, we get:

$760torr\times 100mL=900torr\times V_2$

$V_2=84.4mL$

Therefore, the final volume will be, 84.4 mL

You might be interested in

Osmosis is defined as the movement of A. Molecules from high concentration to a low concentration B. Water molecules from a high

babunello [35]

Answer:

Water molecules from a low concentration to a high concentration through a selectively permeable membrane

Explanation:

Osmosis is a special case of diffusion where solvent molecules move from a low concentration (in terms of solution or solute concentration) to a higher concentration through a special membrane known as semi permeable membrane. Semi permeable membrane allows movement of only solvent molecules through it and not solute particles.

8 0

3 years ago

Why do fish give off ammonia?

solong [7]

Answer:

Fish can excrete their body's waste very easily. Ammonia wastes normally diffuse out into the water through their gills. ... The ammonia is converted to nitrite and then converted into nitrate. Once the ammonia released by the fish is converted by bacteria into nitrate, it is relatively non-toxic to the fish.

8 0

3 years ago

Which of the following is an example of a decomposition reaction

Snezhnost [94]

HgO--> Hg + O2 Decompostion can spilt one compound into two parts or more pieces. These pieces can be elements or simpler compounds.

8 0

3 years ago

Arsine, AsH3, is a highly toxic compound used in the electronics industry for the production of semiconductors. Its vapor pressu

Alex787 [66]

Answer : The value of $\Delta H$ of vaporization for arsine and its normal boiling point is, 17694.3 J/mol and 209.9 K respectively.

Explanation :

First we have to calculate the value of $\Delta H$ of vaporization for arsine.

The Clausius- Clapeyron equation is :

$\ln (\frac{P_2}{P_1})=\frac{\Delta H_{vap}}{R}\times (\frac{1}{T_1}-\frac{1}{T_2})$

where,

$P_1$ = vapor pressure of arsine at $-111.95^oC$ = 35 torr

$P_2$ = vapor pressure of arsine at $-83.6^oC$ = 253 torr

$T_1$ = temperature of arsine = $-111.95^oC=273+(-111.95)=161.05K$

$T_2$ = temperature of arsine = $-83.6^oC=273+(-83.6)=189.4K$

$\Delta H_{vap}$ = heat of vaporization = ?

R = universal constant = 8.314 J/mol.K

Now put all the given values in the above formula, we get:

$\ln (\frac{253}{35})=\frac{\Delta H_{vap}}{8.314}\times (\frac{1}{161.05}-\frac{1}{189.4})$

$\Delta H_{vap}=17694.3J/mol$

Now we have to calculate the normal boiling point of arsine.

The Clausius- Clapeyron equation is :

$\ln (\frac{P_2}{P_1})=\frac{\Delta H_{vap}}{R}\times (\frac{1}{T_1}-\frac{1}{T_2})$

where,

$P_1$ = vapor pressure of arsine at $-111.95^oC$ = 35 torr

$P_2$ = vapor pressure of arsine at normal boiling point = 760 torr

$T_1$ = temperature of arsine = $-111.95^oC=273+(-111.95)=161.05K$

$T_2$ = normal boiling point of arsine = ?

$\Delta H_{vap}$ = heat of vaporization = 17694.3 J/mol

R = universal constant = 8.314 J/mol.K

Now put all the given values in the above formula, we get:

$\ln (\frac{760}{35})=\frac{17694.3J/mole}{8.314J/K.mole}\times (\frac{1}{161.05}-\frac{1}{T_2})$

$T_2=209.9K$

Hence, the value of $\Delta H$ of vaporization for arsine and its normal boiling point is, 17694.3 J/mol and 209.9 K respectively.

5 0

3 years ago

A neutral atom contains equal numbers of protons and electrons.

Shtirlitz [24]

It is true because protons are positively charged and electrons are negatively charged. if there is the same number of protons and electrons, both charges cancel out.

8 0

3 years ago

Read 2 more answers