Question

If hydrogen temperature goes from 50 tp 75 degrees Celsius in 22g sample, how much heat was used? Give explanation!

A.15,730 J
B.23,595 J
C.7865 J
D.550 J

Answer 1

The heat used if the hydrogen temperature goes from 50 to 75 c is calculated using

Q(heat) = M(mass) xC( specific heat capacity for hydrogen) x deltaT (change in temperature) formula
Q=?
m =22g
c= 14.3 j/g/c
delta T = 75-50 = 25c

Q = 22 g x 14.3 j/g/c x 25 =7865 j (answer c)