Respuesta :
Answer:
4541.8 J
Explanation:
First we find the mass of benzene available
mass = density x volume
     = 0.867 x 34.1
     = 29.5647 g
Then we find the amount of heat transferred by two processes:
heat tranferred = heat lost during temp drop + heat lost during freezing
             = mcΔT + mL
             = 29.5647 x 1.74 x (20.8 - 5.5) + 29.5647 x 127
             = 4541.7883434 J
             = 4541.8 J
            Â
Answer:
4541.8 J or 4.542 KJ
Explanation:
From our knowledge of density of a substance, Â density=mass/volume
∴ mass=density×volume ⇒0.876×34.1=29.565 g
The quantity of heat transferred to the surrounding ∈ΔH=mcΔT+ML
=29.565×1.74(20.8-5.5)+(29.565× 127) = 4541.8 J or 4.542 KJ