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A busy housewife left 25 g of ice in an open insulated container while she was answering her cellphone. When she returned, the ice at 0 ºC was converted to water at 3.0 ºC. Calculate the energy needed for the ice to totally melt ad reach its present temperature(Assume no heat loss) specific heat capacity of water = 4200 J/kgK Specific Latent heat of fusion of Ice = 340 000J/Kg *

Respuesta :

Perplexed20
___Latent (hidden) heat to turn a gram of water from ice to water is 340 joules/gram

So latent heat of 25 grams is 8500 joules

___Sensible heat (measurable with a thermometer). Is 4.2 joules/gram

So 25 x 4.2= 105 joules

Total energy to cause phase change (ice to water) and raise mass of 25 grams from 0 degC to 3 degC is 8500 + 105 or
8605 joules
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