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a 5g piece of lead(specific heat .129 J/gC) is placed in 50ml of water(4.184). water temp...

a 5g piece of lead(specific heat .129 J/gC) is placed in 50ml of water(4.184).
water temp incteases from 20 to 22 deg C
lead final temp is also 22 deg C
what was initial lead temp?

please show work, equation used

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Answer #1

Concept - as the water gains temperature the lead will lose heat. We equate the heat lost by lead to heat gained by water as per conservation of energy to find the initial temperature of lead as shown below,

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