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

neutrons are in the middle of the atom and the electrons, which are much smaller.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.