Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Promoted
How many kJ of heat are needed to completely melt 46.0 g of sodium metal? The heat of fusion for this metal is 2.60 kJ/mol.?
2 Answers
Relevance
- JimLv 711 months agoFavorite Answer
GIven 46.0 g, write that down and apply converters (1)
46.0 g (1 mol/22.989769g) (2.60 kJ/mol) leaves just 'kJ' and cancels other units
5.202314125035358119 kJ
round to 3 sigfigs = 5.20 kJ
Source(s): WATCH www.youtube.com/watch?v=8jB-LaTGgq8 - davidLv 711 months ago
Q = Lf X n ... Lf = heat of fusion .. n = number of moles
n = mass / molar mass = 46.0 / 23 = 2 moles
Q = 2.60 X 2 = 5.200 kJ <<< round for sig figs
Still have questions? Get your answers by asking now.