Homework Help: chemistry

Posted by Faisal on Thursday, December 1, 2011 at 11:07pm.

A 210 g iron bar is heated and then placed in 100. g of water in an insulated container. The water temperature increases from 21.2 °C to 53.3 °C. What was the initial temperature of the iron bar?

(Specific heats: cFe = 0.449 J/gK; cwater = 4.184 J/gK)

chemistry - DrBob222, Friday, December 2, 2011 at 12:26am
heat lost by Fe + heat gained by H2O = 0
[mass Fe x specific heat Fe x (Tfinal-Tinitial)] + [mass H2O x specific heat H2O x (Tfinal-Tinitial) = 0
Substitute and solve for Tinitial for Fe.
chemistry - robert, Monday, April 29, 2013 at 10:17am
How much energy is required to heat 120.0g of water from 2.0°c to 24.0°c (Cp of H2O=4.184J/g
chemistry - robert, Monday, April 29, 2013 at 10:18am
How much energy is required to heat 120.0g of water from 2.0°c to 24.0°c (Cp of H2O=4.184J/g

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