Question

31) what is the energy required to change 20g of copper, whose specific heat is 0.39j/gc,

change from 20 to 40 degrees?

Answer 1

Step-by-step explanation:

given :

m = 20 g

sh = 0.39 J/g°C

∆T = 40-20 = 20°C

Find the Energy!

solution :

E =m. sh. ∆T

= 20 × 0.39 × 20

= 156 J

Answer 2

♪Answer :

• mass = 20g
• sh = 0.39j/g°c
• ∆T = 40° - 20° = 20°

So, energy required is

Energy = mass*sh*∆T

Energy = 20g*0.39j/g°c*20°

Energy = 156joule✅

~Physics#1