1.

It has been found that 221.4J is needed to heat 30g of ethanol from 150 C to 180 C. calculate (a) specific heat capacity, and (b) molar heat capacity of ethanol.

Answer»

(a) heat(q) = mass x specific hea capacity x ∆T 

221.4 = 30 x c x 3 

c = 221.4/90 = 2.46 Jg-1 K-1 

(b) molar heat capacity = 2.4 x 46 = 110.4Jmol-1 K-1 .



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