Compare the amount of heat energy required to raise the temperature of 2 kg of water and 2 kg of iron 30 °C? Cp (water) = 4.184 ; Cp (iron) = 0.450 *

Amount of heat energy required by water is 251100 J

    Amount of energy required by iron is 4500 J

Explanation:

The heat required to raise the temperature of 2kg water at 30 degrees:

Q= mcΔT     (C= specific heat, ΔT change in temperature, m mass of the substance)

The specific heat capacity of water is given as 4.184

the specific heat capacity of iron is given as 0.45 AT 25 DEGREES

Q= 2 *1000*0.450*5  as (ΔT= 30-25)

    = 4500 J

Heat required by 2kg iron at 30 degrees

Q= 2*1000*4.184* 30

  = 251100 joules

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