you have a block of material that measures 2.5cm x 3.5cmx 10.7cm and hasd a density of 10.68g/cm. the block has a density of 10.68g/cm. the block has a specific heat of 0.222cal/gc and is heated from -40c to 120c. howmany joules of heat did it take to do this?
Following the steps of the previous answer,
V= 2.5cm*3.5cm*10.7cm= 93.625 cm3
m= 93.625cm3 * (10.68g/1 cm3) = 999.915g
ΔT = 120 ºC - (-40ºC) = 160 ºC
(4.1868 J/1cal)* (0.222 cal/g ºC) = .9294696 J/gºC
Q= (999.915g) * (.9294696 J/gºC) * 160 ºC = 148702 J or 150kJ to 2 sig figs