[Summerlover01]

I have these two problems for homework in math and i dont know how to solve them

1. 200g of water at 30'C are mixed with 20 g of silver at 350'C. Find the final temperature of the system.

2. 26 g of water at 18'C are mixed with 49 g of water at 70'C. Find the final temperature of the system.

i dont understand what to do, please if you can explain them it would be most appreciated

[darko]

try with Richmann"s rule:

m₁c₁(T-T₁)=m₂c₂(T-T₂)

1. is it all data you have?
2. c₁=c₂

[Summerlover01]

i still dont understand, i need to see steps

[hamil]

Think about the problem this way.

The heat lost by the silver when it is put into the water must equal the heat gained by the water. We must solve for the final temperature, T, of the water. You must know the specific heat of both the water and silver to solve. Get the data from a table. Specific heat of  AG is .24 and water is 4.18

Heat lost by the silver is (20)(.24)(350 - T)
Heat gained by the water is (200)(4.16)(T-30)

Set the two expressions equal to each other and solve for T.