Asubstance of unknown mass absorbs 1932 joules of energy, going from 26 to 42 degrees celsius. if the specific heat of the substance is 4.29 j/g·°c, how much of the substance is present?
2.8 g
6.6 g
66.2 g
28 g

Answer : The mass of the substance is, 28 g

Solution :

Formula used :

where,

Q = heat absorbs = 1932 J

m = mass of the substance = ?

c = specific heat of substance =      

= final temperature =

= initial temperature =

Now put all the given values in the above formula, we get the mass of the substance.

Therefore, the mass of the substance is, 28 g

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

the increase of protons   hope this