An unknown substance has a mass of 14.7 g . when the substance absorbs 1.323×102 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?

a. aluminum 0.903
b. iron 0.449
c. water 4.184
d. silver 0.235
e. copper 0.385
f. ethanol 2.42

Answer : The correct option is, (B) iron 0.449

Explanation :

Formula used :

where,

Q = heat absorb =

m = mass of substance = 14.7 g

c = specific heat of substance = ?

= change in temperature

= initial temperature =

= final temperature =

Now put all the given value in the above formula, we get:

Form the value of specific heat of substance, we conclude that the metal used in this was iron.

Therefore, the correct option is (B) iron 0.449