Help please..
When a 9.00 g sample of metal is heated to 100 C and dropped into 20 mL's of water at 25 C, the final temperature is 28.29 C

a) calculate the specific heat of the metal, assuming perfect insulation and a calorimeter heat capacity of zero.

b) Estimate the atomic weight of the element and guess its identity

Question

Help please..
When a 9.00 g sample of metal is heated to 100 C and dropped into 20 mL's of water at 25 C, the final temperature is 28.29 C 

a) calculate the specific heat of the metal, assuming perfect insulation and a calorimeter heat capacity of zero. 

b) Estimate the atomic weight of the element and guess its identity

joannablackwelder · Answer

First, let me say that this was a fun mystery. :)

joannablackwelder · Answer

I used specific heat of water, 4.180J/(gΔT), to calculate the amount of heat, q, gained in this heat transfer process.

joannablackwelder · Answer

The heat gained by the water equals the heat lost by the metal. I used this, and the other information given in the problem, to calculate the specific heat of the metal.

joannablackwelder · Answer

Then I used Dulong and Petit's Law to calculate molar mass.

joannablackwelder · Answer

Let me know what you think!