a 12.8 g sample of shiny, orange-brown metal is heated at 65.00 degree Celsius a

Question

a 12.8 g sample of shiny, orange-brown metal is heated at 65.00 degree Celsius and then added to 25.00 g of water in a coffee- cup calorimeter. the water temperature changes from 25.55 degrees Celsius to 27.25 degrees Celsius. what is the unknown metal? a 12.8 g sample of shiny, orange-brown metal is heated at 65.00 degree Celsius and then added to 25.00 g of water in a coffee- cup calorimeter. the water temperature changes from 25.55 degrees Celsius to 27.25 degrees Celsius. what is the unknown metal?

Explanation / Answer

Heat lost by metal = heta gained by water

specific heat of metal x mass of metal x temp change = specific heat of water x mass x temp change

S x ( 12.8) x ( 65-27.25) = 4.184 x ( 25 ) x ( 27.25-25.55)

S = 0.368 J/gC

based on specific heat of metals table   its Gallium

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