Question

this is for 11 standard
The specific heat of a substance varies as (3t^2+t)×10^−3 cal/g−0c. What is the amount of heat required to raise the temperature of 1kg of substance from 10'c to 20'c

Answer 1

hope it will help you

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Answer 2

option (3) 7.150 KCal.

explanation : amount of heat required, H =

here given, Tf = 20°C , Ti = 10°C , s = (3t² + t) × 10^-3 cal/g.°C and m = 1 kg = 1000g

=

= cal

= 1 × [(20³ - 10³) + (20² - 10²)/2] cal

= [7000 + 150 ] cal

= 7150 cal

= 7.150 Kcal