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

c (diamond),

sio2 (quartz)