Chemistry, 16.06.2020 02:57 estrellaalcantar16

Consider that you have a balloon containing 2.00 moles of CO and 1.00 mole of O2 which is in a room that has a temperature of 25.8oC and a pressure of 1.00 atm. Then, the following reaction occurs inside the balloon to completion: 2 CO(g) + O2(g) -> 2 CO2(g). Calculate the change in work due to the reaction occurring inside the balloon.

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Work is equivalent to pressure multiplied by length. Work occurs when there is movement in the direction of the force. The SI unit of work is the joule (J), and the further calculation can be defined as follows:

Given:

Pressure= 1.00 atm

Temperature $\bold{= 25.8^{\circ}\ C}$

Given equation:

$\bold{2 CO\ (g) + O_2\ (g)\longrightarrow 2 CO_2\ (g)}\\\\$

Converting the temperature $\bold{^{\circ}\ C}$ to $\bold{K}$ :

$\bold{= 25.8 + 273.15}\\\\\bold{= 298.95\ K}$

Calculating the $\bold{\Delta n}$ value:

$\Delta n = 2 - (2 + 1) = -1$

Calculating work:

$\bold{w = \Delta n \times R T}$

$\bold{= - 1 \times 8.314 \times 298.95}\\\\ \bold{= -2,485.4703\ J} \\\\ \bold{=- 2.48\ KJ}$

Therefore, the final answer is "-2.48 KJ".

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Answer from: tanashaw16

$\large \boxed{\text{-2.48 kJ}}$

Explanation:

1. Calculate the moles of CO₂ formed

2CO + O₂ ⟶ 2CO₂

n/mol: 2.00 2.00

The molar ratio is 2 mol CO₂:2 mol CO.

$\text{Moles of CO}_{2} = \text{2 mol CO} \times \dfrac{\text{2 mol CO}_{2}}{\text{2 mol CO}}= \text{2.00 mol CO}_{2}$

2. Calculate the change in the number of moles

We started with 3.00 mol of gas and ended with 2.00 mol.

Δn = n₂ - n₁ = 2.00 mol - 3.00 mol = -1.00 mol

3. Calculate the work done

(a) Convert the temperature to kelvins

T = (25.8 + 273.15) K = 298.95 K

(b) Calculate the work

$w = -p\Delta V = -\Delta nRT = -1.00 \text{ mol} \times 8.314 \text{ J}\cdot\text{K}^{-1} \text{mol}^{-1} \times 298.95 \text{ K}\\= \text{-2480 J} = \textbf{-2.48 kJ}\\\text{The work done is $\large \boxed{\textbf{-2.48 kJ}}$}$

Answer from: Quest

answer: mercury

explanation:

Which of these is not a commonly mined metallic substance?

Answer from: Quest

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.

Write 15 uses of a mercury barometer along with its characterestics

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Consider that you have a balloon containing 2.00 moles of CO and 1.00 mole of O2 which is in a room...

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