Question

50gr of water at 20° c is mixed with 50gr of water at t° c. if final temperature is 30° c then final t° c?

Answer 1

mass and c (heat capacity) are the same. take em as they are. let T= 30° (final temperature, given)

t1=20, and t2= t2 (as we have to find it)

now, mc (T - t1)= mc (t2 - T)

50 × c × (30-20) = 50× c × (t2- 30)

(50 and c get cancelled on the both sides)

so, 10 = t2 - 30

t2 = 40° ...} ans.