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kaheart [24]
3 years ago
15

Are the effects of adding heat reversible

Chemistry
1 answer:
Schach [20]3 years ago
7 0

Answer:

yes they are

Explanation:

if you are heating up glass i believe not, unless you want to break the glass. Making glass go from high to low or low to high tempuatures quickly will cause it to break. How ever metal will be stronger as long as you dont bend it.

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Balance the following equation and determine the coefficients in order
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Answer:

D 4,3,2

Explanation:

4 Co + 3 O2 ----> 2 Co2O3

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If you're standing on the beach looking out at the ocean as far as you can see, where's your zenith?
saveliy_v [14]
Straight above your head
4 0
4 years ago
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Use the formation reactions below such that when added together, they match the balanced equation for the combustion of methane.
muminat

Answer:

ΔH of the reaction is -802.3kJ.

Explanation:

Using Hess's law, you can know ΔH of reaction by the sum of ΔH's of half-reactions.

Using the reactions:

<em>(1) </em>Cgraphite(s)+ 2H₂(g) → CH₄(g) ΔH₁ = −74.80kJ

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<em>(3) </em>H₂(g) + 1/2 O₂(g) → H₂O(g) ΔH₃ = −241.80kJ

The sum of (2) - (1) produce:

CH₄(g) + O₂(g) → CO₂(g) + 2H₂(g) ΔH' = -393.5kJ - (-74.80kJ) = -318.7kJ

And the sum of this reaction with 2×(3) produce:

CH₄(g) + 2 O₂(g) → CO₂(g) + 2H₂O(g) And ΔH = -318.7kJ + 2×(-241.80kJ) =

<em>-802.3kJ</em>

7 0
3 years ago
Why do solids have a fixed shape?
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D. The particles are tightly packed together
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a patient is to receive 25 mg of methimazole, a drug used to treat hyperthyroid conditions. the drug is dissolved in solution co
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3 years ago
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