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1. A 10 g gold coin is heated from 25°C to 50°C (CAu is 0.13 J/g-°C). What is the H? (Points : 1) +32.5 J 25 J +25 J - 32.5 J I know it is 32.5 J but is it negative or positive.…
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1. A 10 g gold coin is heated from 25°C to 50°C (CAu is 0.13 J/g-°C). What is the H? (Points : 1) +32.5 J 25 J +25 J - 32.5 J I know it is 32.5 J but is it negative or positive.…
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Aug 22, 2019
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1. A 10 g gold coin is heated from 25°C to 50°C (CAu is 0.13 J/g-°C). What is the H?
(Points : 1)
+32.5 J
25 J
+25 J
- 32.5 J
I know it is 32.5 J but is it negative or positive... I say it is negative, but I could be wrong...,
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Pbz
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Answer:
+32.5 J
Step-by-step explanation:
Topshot
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Aug 25, 2019
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The correct answer is + 32.5 J because heat is absorbed here by copper not evolved also after calculation we will find the H value is positive, lets calculate it:
H = m C Δt where:
m = 10 g
C = 0.13 J/g.°C
Δ t = final temperature - initial temperature = 50 - 25 = + 25 °C
so H = 10 x 0.13 x (+25) = + 32.5 J
Potassium Ion
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Aug 29, 2019
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