Question

If it requires 115 J of heat to increase the temperature of 2.17 moles of a solid metal from 24.37 °C to 26.32 °C at constant pressure, then what is the identity of the metal?

Answer 1

Look up the Law of Dulong and Petit

Answer 2

hmm never learned those, but thanks

Answer 3

still confused..

Answer 4

yeah, not sure how to solve it. ive subtracted the temp, but what do i do with the mols and J?

Answer 5

First you find the specific heat, then use the law of Dulong and Petit.

q = mass x specific heat x (Tfinal-Tinitial)
115 = etc etc. Solve for specific heat.

Answer 6

so 115 = n/M(1.95)(specific heat)?

Answer 7

OK. So 115 = 2.17 mols x specific heat x 1.95

Solve for specific heat.
The Law of D and P says
specific heat x atomic mass = about 25. I think the average is 24.94