Please help Calculate how many joules of energy are needed to warm 4.37 g of silver from 25.0C 27.50 if the specific heat of silver is 0.24 J/g C?

Known

c

=

0.24 J/g

∘

C

)

m

=

7.37 g

T

i

=

25.0

∘

C

T

f

=

27.5

∘

C

Δ

T

=

T

f

−

T

i

=

27.5

∘

C

−

25.0

∘

C

=

2.5

∘

C

Unknown:

Q

Solution

Q

=

(

0.24 J

g

∘

C

)

(

7.37

g

)

(

2.5

∘

C

)

=

4.4 J

rounded to two

Explanation:

Energy needed = mass * temperature difference * specific heat

= 4.37 * (27.5-25) * 0.24

= 4.37 * 2.5 * 0.24

= 2.622J

Explanation:

warm up 2.5C

mass 4.37

specific heat 0.24

energy = 2.5*4.37*0.24

= 2.6J

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