Question

29g of copper pellets are removed from a 300 Celsius oven and immediately dropped into 100 mL of water at 22 Celcius in an insulated cup.

What will the new water temperature be?

Answer 1

Since the cup is insulated, there is no heat loss. Therefore the heat absorbed by the water must equal the heat given up by the pellets.

Answer 2

so shall i use the specific heat capacity of copper?

Answer 3

Yes. ...and of water:
\(Delta Q_w=m_w c_w\Delta T_w\) and \(Delta Q_{c}=m_{c} c_{c}\Delta T_{c}\)

Answer 4

ok so Q for water will b the same as Q for copper?

Answer 5

Right: the heat absorbed by the water must equal the heat given up by the pellets.

Answer 6

and the mass of water will the same as copper?

Answer 7

how will i find the mass of water?

Answer 8

You know the volume, so you need the density of water.

Answer 9

ohk great!

Answer 10

thanku very much i got it right!! thank u:))