The Pilling-Bedworth ratios are calculated below using a basis of 100.0 g of metal and the following equation: P.B. ratio=[volume of oxide produced by oxidation]/[volume of metal consumed by oxidation] 1. Tungsten oxidation is express as W+3/202→WO3. Density of W and WO3 is 19.35 [g/cm³] and 12.11 [g/cm³], respectively. Mass of W and O is 183.84 g/mol and 16.00 g/mol. 1-a: Calculate the volume, Vw of 100 g tungsten. Vw = [___] cm³ (*Show up to the 2nd decimal place.) 1-b: Calculate the mass of WO3, mw03 when 100 g of tungsten is oxidized. mwo3 g (*Show up to the 1st decimal place.) A 1-c: Calculate the volume, Vwo3 of mwo3 tungsten oxide. Vwo3 = [] cm³ (*Show up to the 2nd decimal place.) A/ 1-d: Calculate the oxide-to-metal volume (Pilling-Bedworth) ratio for tungsten. P.B. ratio = [___]) (*Show up to the 2nd decimal place.) A 2. Based on the result from above calculation, what will happen to tungsten oxide? a: The oxide film is too thin and will most likely break down. b: The oxide film chips off and offers no protection. c: The oxide film is passivating and offers protection from surface oxidation.
The Pilling-Bedworth ratios are calculated below using a basis of 100.0 g of metal and the following equation: P.B. ratio=[volume of oxide produced by oxidation]/[volume of metal consumed by oxidation] 1. Tungsten oxidation is express as W+3/202→WO3. Density of W and WO3 is 19.35 [g/cm³] and 12.11 [g/cm³], respectively. Mass of W and O is 183.84 g/mol and 16.00 g/mol. 1-a: Calculate the volume, Vw of 100 g tungsten. Vw = [___] cm³ (*Show up to the 2nd decimal place.) 1-b: Calculate the mass of WO3, mw03 when 100 g of tungsten is oxidized. mwo3 g (*Show up to the 1st decimal place.) A 1-c: Calculate the volume, Vwo3 of mwo3 tungsten oxide. Vwo3 = [] cm³ (*Show up to the 2nd decimal place.) A/ 1-d: Calculate the oxide-to-metal volume (Pilling-Bedworth) ratio for tungsten. P.B. ratio = [___]) (*Show up to the 2nd decimal place.) A 2. Based on the result from above calculation, what will happen to tungsten oxide? a: The oxide film is too thin and will most likely break down. b: The oxide film chips off and offers no protection. c: The oxide film is passivating and offers protection from surface oxidation.
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Chapter1: Chemical Foundations
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![The Pilling-Bedworth ratios are calculated below using a basis of 100.0 g of metal
and the following equation:
P.B. ratio=[volume of oxide produced by oxidation]/[volume of metal consumed by
oxidation]
1. Tungsten oxidation is express as W+3/202→WO3. Density of W and WO3 is
19.35 [g/cm³] and 12.11 [g/cm³], respectively. Mass of W and O is 183.84 g/mol
and 16.00 g/mol.
1-a: Calculate the volume, Vw of 100 g tungsten.
Vw = [___] cm³ (*Show up to the 2nd decimal place.)
1-b: Calculate the mass of WO3, mw03 when 100 g of tungsten is oxidized.
mwo3 g (*Show up to the 1st decimal place.)
A
1-c: Calculate the volume, Vwo3 of mwo3 tungsten oxide.
Vwo3 = [] cm³ (*Show up to the 2nd decimal place.)
A/
1-d: Calculate the oxide-to-metal volume (Pilling-Bedworth) ratio for tungsten.
P.B. ratio = [___]) (*Show up to the 2nd decimal place.)
A
2. Based on the result from above calculation, what will happen to tungsten oxide?
a: The oxide film is too thin and will most likely break down.
b: The oxide film chips off and offers no protection.
c: The oxide film is passivating and offers protection from surface oxidation.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F093e7116-3e01-49ad-9157-7a22a5caeb16%2F1d59b4cb-2c90-4688-a480-0ec4a7cdce1f%2Fj67g3n8_processed.png&w=3840&q=75)
Transcribed Image Text:The Pilling-Bedworth ratios are calculated below using a basis of 100.0 g of metal
and the following equation:
P.B. ratio=[volume of oxide produced by oxidation]/[volume of metal consumed by
oxidation]
1. Tungsten oxidation is express as W+3/202→WO3. Density of W and WO3 is
19.35 [g/cm³] and 12.11 [g/cm³], respectively. Mass of W and O is 183.84 g/mol
and 16.00 g/mol.
1-a: Calculate the volume, Vw of 100 g tungsten.
Vw = [___] cm³ (*Show up to the 2nd decimal place.)
1-b: Calculate the mass of WO3, mw03 when 100 g of tungsten is oxidized.
mwo3 g (*Show up to the 1st decimal place.)
A
1-c: Calculate the volume, Vwo3 of mwo3 tungsten oxide.
Vwo3 = [] cm³ (*Show up to the 2nd decimal place.)
A/
1-d: Calculate the oxide-to-metal volume (Pilling-Bedworth) ratio for tungsten.
P.B. ratio = [___]) (*Show up to the 2nd decimal place.)
A
2. Based on the result from above calculation, what will happen to tungsten oxide?
a: The oxide film is too thin and will most likely break down.
b: The oxide film chips off and offers no protection.
c: The oxide film is passivating and offers protection from surface oxidation.
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