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Reika [66]
3 years ago
7

Butane, c4h10, is a component of natural gas that is used as fuel for cigarette lighters. the balanced equation of the complete

combustion of butane is 2c4h10(g)+13o2(g)→8co2(g)+10h2o(l) at 1.00 atm and 23 ∘c, what is the volume of carbon dioxide formed by the combustion of 1.60 g of butane?
Chemistry
1 answer:
ludmilkaskok [199]3 years ago
5 0

Reaction of combustion of butane is a as follows:

2 C₄H₁₀ + 13 O₂ --> 8 CO₂ + 10 H₂O:  

As it can be seen from the equation that 2 mole of butane produce= 8 mole of butane produce  

1 mole of butane produce= 4 mole of butane produce

1.60 g of butane=\frac{1.6g}{58.124\frac{g}{mol}}

= 0.027 mole of butane

0.027 mole of butane =\frac{8}{2 }\times 0.027

                                     = 0.108 mole of CO₂.

Using ideal gas equation,  

P\times V=n\times R\times T

Here,  

P denotes pressure  

V denotes volume  

n denotes number of moles of gas  

R denotes gas constant  

T denotes temperature  

The values at STP will be:  

P=1 atm  

T=23+273 K = 296 K

R=0.0821 atm L mol ⁻¹

Number of moles of gas, n= 0.018

Putting all the values in the above equation,

V=\frac{0.018\times 0.0821\times 296}{1}

V= 2.62 L

So the volume will be 2.62 L

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At a certain temperature the vapor pressure of pure acetic acid HCH3CO2 is measured to be 226.torr. Suppose a solution is prepar
Rudiy27

Answer:

The partial pressure of acetic acid is 73.5 torr

Explanation:

Step 1: Data given

Total pressure is 226 torr

mass of acetic acid = 126 grams

mass of methanol = 141 grams

 

Step 2: Calculate moles of acetic acid

moles acetic acid = mass acetic acid / molar mass acetic acid

moles acetic acid = 127 grams / 60.05 g/mol

moles acetic acid = 2.115 moles

Step 3: Calculate moles of methanol

moles methanol = 141 grams / 32.04 g/mol

moles methanol = 4.40 moles

Step 4: Calculate total moles

Total moles = moles of acetic acid + moles methanol

Total moles = 2.115 moles + 4.40 moles

Total moles = 6.515 moles

Step 5: Calculate mole fraction of acetic acid

2.115 moles / 6.515 moles = 0.325

Step 6: Calculate partial pressure of acetic acid

P(acetic acid) = 0.325 * 226

P(acetic acid) = 73.45 torr ≈73.5

 

We can control this by calculating the partial pressure of methanol

mole fraction of methanol = (6.515-2.115)/6.515 = 0.675

P(methanol) = 0.675 * 226 = 152.55

226 - 152.55 = 73.45 torr  

The partial pressure of acetic acid is 73.5 torr

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