Question

7000 J of heat energy is supplied to a copper
sphere of mass 90 g. What is the raise in tem-
perature of the sphere?
(Specific heat capacity of copper = 0.09 cal
g-1°C-1)​

Answer 1

Answer:

Given S=0.03calg

−1

o

C

−1

m=500g

∴C=mS=500×0.03=15cal

o

C

−1

Explanation:

please follow me

Answer 2

Answer:

206°C

Explanation:

$7000j \: = 7000 \div 4.2 \: cal$$on \: further \: simplifying \: we \: get \: 7000j \: = (5000 \div 3)cal$

We know the formula, Q = m × s × t

where Q means Heat,

m means mass,

s means specific heat capacity,

and t means temperature.

here, we get

Q = 5000 ÷ 3

m = 90

s = 0.09 or 9 ÷ 100

t = ?

so, according to formula,

5000 ÷ 3 = 90 × 9 ÷ 100 × t

On further simplifying, we get,

t = 205.76°C

on rounding off, we get

t = 206°C.

Ans = 206°C