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nydimaria [60]
1 year ago
14

the specific heat of the metallic element rhodium is 0.240 j/g-k at 25°c. if 586 j of heat is added to an 80.0 g block of rhodiu

m metal that is initially at 25.0°c, what is the expected final temperature of the block? the specific heat of the metallic element rhodium is 0.240 j/g-k at 25°c. if 586 j of heat is added to an 80.0 g block of rhodium metal that is initially at 25.0°c, what is the expected final temperature of the block? 2470°c 30.5°c 55.5°c 26.8°c 32.3°c
Chemistry
1 answer:
andrey2020 [161]1 year ago
6 0

The expected final temperature of the block, given that 586 J of heat were added to it is 55.5 °C

<h3>How to determine the final temeprature</h3>

We'll begin by obtaining the change in the temperature of the block. This can be obtained as follow:

  • Specific heat capacity of block (C) = 0.240 J/gºC
  • Heat added (Q) = 586 J
  • Mass of block (M) = 80.0 g
  • Change in temperature (ΔT) =?

Q = MCΔT

Divide both sides by MC

ΔT = Q / MC

ΔT = 586 / (80.0 × 0.240)

ΔT = 586 / 19.2

ΔT = 30.5 °C

Finally, we shall determine the final temperature of the block. This can be obtained as follow:

  • Initial temperature (T₁) = 25 °C
  • Change in temperature (ΔT) = 30.5 °C
  • Final temperature (T₂) = ?

ΔT = T₂ – T₁

30.5 = T₂ – 25

Collect like terms

T₂ = 30.5 + 25

T₂ = 55.5 °C

Thus, from the calculation made above, we can conclude that the final temperature is 55.5 °C

Learn more about heat transfer:

brainly.com/question/14383794

#SPJ1

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Starting with 12.00 moles Mg, we would therefore hope to find twice that, or 24.00 moles of Ag.

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3 years ago
The Nutrition Facts label for crackers states that one serving contains 19 g of carbohydrate, 4 g of fat, and 2 g of protein. Wh
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<u>Answer:</u> The amount of kilocalories contained in the given serving of crackes is 0.120 kCal

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<u>As per the USDA:</u>

Carbohydrates provide 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram

We are given:

Mass of fat in the crackers = 4 g

Mass of carbohydrates in the crackers = 19 g

Mass of protein in the crackers = 2 g

Conversion factor used:  1 kCal = 1000 Cal

Applying unitary method:

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1 gram of fat provides 9 calories

So, 4 gram of fat will provide = \frac{9}{1}\times 4=36Cal=0.036kCal

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1 gram of carbohydrates provides 4 calories

So, 19 gram of carbohydrates will provide = \frac{4}{1}\times 19=76Cal=0.076kCal

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1 gram of proteins provides 4 calories

So, 2 gram of fat will provide = \frac{4}{1}\times 2=8Cal=0.008kCal

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8 0
3 years ago
Solid aluminum (AI) and oxygen (O_2) gas react to form solid aluminum oxide (Al_2O_3). Suppose you have 7.0 mol of Al and 9.0 mo
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Answer:

There will be formed 3.5 moles of Al2O3 ( 356.9 grams)

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Molar mass of O2 = 32 g/mol

Step 2: The balanced equation

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Step 3: Calculate limiting reactant

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Al is the limiting reactant, it will be consumed completely (7 moles).

O2 is in excess.  There will react 3/4 * 7 = 5.25 moles

There will remain 9-5.25 = 3.75 moles

Step 4: Calculate moles Al2O3

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For 7.0 moles of Al we'll have 3.5 moles of Al2O3 produced

Step 5: Calculate mass of Al2O3

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