Phases for Sodium Metal






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Mara Lockhart 3J
Posts: 53
Joined: Fri Sep 26, 2014 2:02 pm

Phases for Sodium Metal

Postby Mara Lockhart 3J » Tue Feb 03, 2015 4:12 pm

In problem 8.105, the question states NaN3 goes to form nitrogen gas and sodium metal, but they put (g) next to Na in the balanced reaction. Why is Sodium metal written in gas form?

Niharika Reddy 1D
Posts: 127
Joined: Fri Sep 26, 2014 2:02 pm

Re: Phases for Sodium Metal

Postby Niharika Reddy 1D » Wed Feb 04, 2015 11:58 am

This is what chem mod replied to the same question asked previously:

"A common reaction is the decomposition of sodium azide, NaN3, to nitrogen gas and sodium metal."
The term sodium metal means Na not Na+. All the metal elements with zero oxidation state are referred to as "metals".
In this reaction Na(g) is the product.

Agreed the question could be more clear that sodium metal gas is formed. Of course it would be very odd if one had Na(s) formed in an explosively fast reaction. Think about that, a metal solid being formed and shooting out towards the passenger to 'inflate' the air bag.

Mara Lockhart 3J
Posts: 53
Joined: Fri Sep 26, 2014 2:02 pm

Re: Phases for Sodium Metal

Postby Mara Lockhart 3J » Thu Feb 05, 2015 11:42 am

Thank you! I did not see the question had been asked previously. but I appreciate the further clarification!!


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