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Roman55 [17]
3 years ago
7

When Karl Kaveman adds chilled grog to his new granite mug, he removes 10.9 kJ of energy from the mug. If it has a mass of 625 g

and was at 25°C, what is its new temperature? Specific heat capacity of granite = 0.79 J/(g·K)
Physics
2 answers:
mrs_skeptik [129]3 years ago
7 0

Answer:

3°C

Explanation:

We can that heat Q=mc_p dT

Where m is the mass c_p = specific heat capacity

dT = Temperature difference

here we have given m=625 g =.625 kg

specific heat of granite =0.79 J/(g-K) = 0.79 KJ/(kg-k)

T_1 =25°C

T_2 we have to find

we have also given Q=10.9 KJ

10.9=0.625×0.79×(25-T_2)

25-T_2 =22

T_2=3°C

n200080 [17]3 years ago
7 0

Answer:

47.08 degree C

Explanation:

H = 10.9 kJ = 10.9 x 1000 J

m = 625 g = 0.625 kg

T1 = 25 degree C

Let the final temperature is T2.

c = 0.79 J/g C = 790 J/kg C

H = m x c x (T2 - T1)

10.9 x 1000 = 0.625 x 790 x  (T2 - 25)

T2 = 47.08 degree C

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