An unknown substance has a mass of 12.3 g . when the substance absorbs 1.107×102 j of heat, the temperature of the substance is raised from 25.0 ∘c to 45.0 ∘c . what is the most likely identity of the substance?

Heat is equal to product of mass, change in temperature and specific heat.

The formula is given by:

where,

q = heat

= change in temperature that is

m = mass of substance

C=  specific heat capacity

Put the values,

=

=

Specific heat capacity is equal to and this  value corresponds to element iron.

Thus, the unknown substance is iron.

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explanation: