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Q = c m ΔT

For the given problem:

m = mass = 350g

Q = energy = 34700 joules

ΔT = change in temperature = 173-22 = 151? C

We need to find the c specific heat. Now Since Q = cmΔT, therefore c = Q/mΔT

c = 34700/(350 x 151) = 34700/52850 = 0.65657521286 J/(g x ?C)

m =mass=400g

Q = energy = 24000 joules

ΔT = change in temperature = x-20 =(x–20)? C

c = Specific heat =7.5 J/(g?C)

We need to find the final temperature. Now Since Q = cmΔT, therefore ΔT = Q/mc

ΔT =24000/(400x7.5)=80 ?C.

Final temperature x=80+20 = 100?C.