If heat q is required to increase the temperature of a metal object from 4 ∘c to 7∘c, the amount of heat necessary to increase its temperature from 7 ∘c to 19 ∘c is most likely if heat is required to increase the temperature of a metal object from 4 to 7, the amount of heat necessary to increase its temperature from 7 to 19 is most likely 4 q. q. 5 q. 3 q.

4Q

Explanation:

Case 1 :

= mass of the metal

= specific heat of the metal

= Change in temperature = 7 - 4 = 3 C

Amount of heat required for the above change of temperature is given as

Case 2 :

= mass of the metal

= specific heat of the metal

= Change in temperature = 19 - 7 = 12 C

Amount of heat required for the above change of temperature is given as

Hence the correct choice is

4Q

a and b sometimes have a positive value