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Physics 66 Online
OpenStudy (anonymous):

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?

OpenStudy (anonymous):

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.

OpenStudy (anonymous):

so shall i use the specific heat capacity of copper?

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

and the mass of water will the same as copper?

OpenStudy (anonymous):

how will i find the mass of water?

OpenStudy (anonymous):

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

OpenStudy (anonymous):

ohk great!

OpenStudy (anonymous):

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

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