Question

Question #f0ab7

Answer 1

`3.96xx10^5J`, rounded to two decimal places.

Explanation:

Taking Specific heat of Aluminum as `904J(kg K)^-1`

Heat required is given by
`DeltaQ=mst`,
where `m,s and t` are the mass, specific heat and rise or gain in temperature of the object; and for change of state as
`DeltaQ=mL`
where `L` is the latent heat for the change of state and
Total heat to be added is `"Heat required to raise the temperature of solid aluminum from "130^@C " to " 600^@C+"Heat required to melt it"`
`=mst+mL`
`=0.45xx904xx(660-130)+0.45xx4.0xx10^5`
`=215604+1.8xx10^5`
`=3.96xx10^5J`, rounded to two decimal places.