Question

1 point
1. How much heat is absorbed
by a copper ingot weighing
400 Kg is heated from 30°C to
72°C for the purpose of
forging? (sp.heat of copper is
0.09)
O A: 1521 Kcal
O B: 1251 Kcal
O C: 1512 Kcal
OD: 1215 Kcal​

Answer 1

H = mc∆t = (400*.09* 42) J = 1512 J

Answer 2

$\bf Hey\:There\:!$

Question:

How much heat is absorbed by a copper ingot weighing 400 Kg is heated from 30°C to 72°C for the purpose of forging? (sp.heat of copper is0.09)

Answer:

Specific heat(s)=0.09 j/g℃

Mass(m)=400 kg=400000 g

Change in temperature(∆t)=72°-30°=32℃

Heat(Q)=m×s×∆t

➳400000×0.09×32

➳1,152,000 J

➳1152 kcal