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lubasha [3.4K]
3 years ago
6

How much heat is needed to increase the temperature of 15g of water from 10°C to 30°C? The specific heat of water is 4.18 (J/g °

C).
Chemistry
1 answer:
Brrunno [24]3 years ago
6 0

Answer:

H=mc∆T

H=15×4.18×20

H=1254J

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Part A
algol13
The correct answer for the question that is being presented above is this one: "C) The reaction is spontaneous at high temperatures." 
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3 years ago
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MArishka [77]

Answer:

FALSE

Since 0.385 < 0.526, the value for week 3 is accepted.

Explanation:

Qexp = (|Xq - Xₙ₋₁|)/w

where Xq is the suspected outlier; Xₙ₋₁ is the next nearest data point; w is the range of data

First, the data are arranged in decreasing order, from highest to lowest:

3. 5.6

2. 5.1

8. 5.1

1. 4.9

6. 4.9

5. 4.7

7. 4.5

4. 4.3

Xq = 5.6; Xₙ₋₁ = 5.1; w = 5.6 - 4.3 = 1.3

Qexp = (|5.6 - 5.1|)/1.3 = 0.385

From tables, at 95% confidence level, for n = 8, Qcrit = 0.526

Since 0.385 < 0.526, the value for week 3 is accepted.

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