Question

Solarcaine aerosol spray is used for temporarily relieving pain as it works as a topical anesthetic numbing the skin. Solarcaine is in fact benzocaine, C9H11NO2 with molar mass 165.2 g/mol.

If a 100.0 mL spray can contains 1.00 g of benzocaine, calculate the pressure within the can and explain why it is likely to explode when heated in a fire where the temperature may be as high as 1300oC ?

What characteristic must a compound have to experience the following intermolecular forces?

London Dispersion Forces

Dipole-dipole forces

Hydrogen bonding

Identify the predominant intermolecular forces in dimethyl ether (CH3OCH3) and ethanol (C2H5OH) and predict which will have the higher boiling point.

Answer 1

Use PV = nRT
n = grams/molar mass.
Calculate P.

For the others, read this.
http://en.wikipedia.org/wiki/Intermolecular_force

Answer 2

PV = nRT does not work there is 2 parts to this question the first part.

If a 100.0 mL spray can contains 1.00 g of benzocaine, calculate the pressure within the can?

And the second part...
explain why it is likely to explode when heated in a fire where the temperature may be as high as 1300oC ?

Answer 3

I beg your pardon. PV = nRT DOES work. That provides at least <b>some</b> information to answer the second part. I didn't answer the second part. Frankly I think the second part is a guess since we don't know how strong the can is; however, I would hazard a guess that at almost 6000 mm Hg pressure it wouldn't survive. And with the word likely in the problem I think the author of the problem expected us to guess. I assumed the student could guess as well.

Answer 4

2.160692 x10 7 atm Is this the correct answer?

Part two is a discussion

Answer 5

Is anyone able to answer this one? I am really struggling..

Identify the predominant intermolecular forces in dimethyl ether (CH3OCH3) and ethanol (C2H5OH) and predict which will have the higher boiling point.

Answer 6

Dimethyl ether = predominate weak dipole-dipole intermolecular force. (positively charged hydrogen atoms and the negatively charged oxygen atoms).

Ethanol = hydrogen bonding (Hydrogen bonding to oxygen)

Hydrogen bonds have higher boiling points

Answer 7

Dimethyl ether = predominate weak dipole-dipole intermolecular force. (positively charged hydrogen atoms and the negatively charged oxygen atoms).
H+ H+
H+- C- O - C - H+
H+ H+


Ethanol = hydrogen bonding (Hydrogen bonding to oxygen)

H+ H+
H+ - C - C - O - H+
H+ H+


Hydrogen bonds have higher boiling points