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  • 24-03-2022
  • Chemistry
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How much energy, in kJ, is released when 27.0 grams of water is cooled from 112C to -15C?

How much energy in kJ is released when 270 grams of water is cooled from 112C to 15C class=

Respuesta :

jieagilm27
jieagilm27 jieagilm27
  • 24-03-2022

Answer: Q

=

−

53

,

796.6

J

Explanation is right here instead

The equation for heat is

Q

=

m

(

t

f

−

t

i

)

C

p

Q = heat in Joules

m = mass in grams

t

f

= final temp

t

i

= initial temp

C

p

= Specific Heat Capacity

For this problem

Q

=

?

?

?

m

=

275

g

t

f

=

38.4

o

C

t

i

=

85.2

o

C

C

p

=

4.18

j

g

o

C

Q

=

275

g

(

38.4

o

C

−

85.2

o

C

)

4.18

J

g

o

C

Q

=

275

g

(

−

46.8

o

C

)

)

4.18

J

g

o

C

Q

=

−

53

,

796.6

J

The negative Joule value means heat is being lost in an exothermic reaction.

Explanation:

Answer Link

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