Chemistry, 06.05.2020 07:06, Sallyjoe9630

What pressure in kPa is exerted by 94.60 g CO2 at 57.00 ℃ in 0.7500 L?

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answered: bruhh14

7,859.9829 kPa

Explanation:

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables where R is the molar constant of the gases:

P * V = n * R * T

Then the pressure can be calculated as:

$P=\frac{n*R*T}{V}$ Equation (A)

In this case R is a known constant and the volume and temperature are given as data. The number of moles n can be calculated from the molar mass. You know:

C: 12 g/moleO: 16 g/mole

Then the molar mass of CO₂ is:

CO₂= 12 g/mole + 2*16 g/mole= 44 g/mole

Now you can apply the following rule of three: if 44 g are contained in 1 mole of CO₂, 94.6 g in how many moles are they?

$moles=\frac{94.6 g*1 mole}{44 g}$

moles= 2.15

Then you know the following data:

n= 2.15 molesR= 0.082 $\frac{atm*L}{mol*K}$ T= 57 C= 330 K (0 C= 273 K)V= 0.75 L

Replacing in Equation (A):

$P=\frac{2.15 moles*0.082 \frac{atm*L}{mol*K} *330 K}{0.75L}$

Solving:

P= 77.572 atm

Knowing that 1 atm is equal to 101.325 kPa, then 77.572 atm is 7,859.9829 kPa

answered: Guest

Wish i can but don’t know this

answered: Guest

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.