A100. g iron rod is heated to an unknown initial temperature. while cooling down to a temperature of 25.0 degree c, the rod releases 600.2 j of energy. what was its initial temperature? (the specific heat of iron is 0.452 j/g degree c)

a) 38.3 j
b) 11.7 j
c) 27.7 j
d) 22.3 j

a)  

Explanation:

As we know that,  

where,

q = heat released  = -600.2 J

= mass of iron rod =100 g  

= final temperature =

= initial temperature = ?

= specific heat of iron =

Now put all the given values in equation, we get

Therefore, the initial temperature of iron rod was

h let me think

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