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Romashka-Z-Leto [24]
3 years ago
5

Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 1.30 MJ o

f energy in the form of heat if the temperature of the sodium is not to increase by more than 10.0 °C? Use C P = 30.8 J / ( K ⋅ mol ) for Na ( l ) at 500 K

Chemistry
2 answers:
Sunny_sXe [5.5K]3 years ago
7 0

Answer:

97 000 g Na

Explanation:

The absortion (or liberation) of energy in form of heat is expressed by:

q=m*Cp*ΔT

The information we have:

q=1.30MJ= 1.30*10^6 J

ΔT = 10.0°C = 10.0 K (ΔT is the same in °C than in K)

Cp=30.8 J/(K mol Na)

If you notice, the Cp in the question is in relation with mol of Na. Before using the q equation, we can find the Cp in relation to the grams of Na.

To do so, we use the molar mass of Na= 22.99g/mol

Cp= \frac{30.8J}{K*mol Na}*\frac{1 mol Na}{22.99 g Na}=1.34\frac{J}{K*g Na}

Now, we are able to solve for m:

m=\frac{1.30*10^6 J}{1.34\frac{J}{K*g Na} *10.0K}=\frac{1.30*10^6J}{13.4\frac{J}{g Na} }  = 9.70*10^4 g Na=97 Kg Na=97 000 g Na

V125BC [204]3 years ago
4 0

Explanation:

Below is an attachment containing the solution.

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Dafna1 [17]

Answer:

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Explanation:

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Give brainliest please it took me over thirty minutes of thinking!

4 0
3 years ago
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OlgaM077 [116]

Answer:

26

Explanation:

26 because if you split 56.23 in half you get 26

8 0
3 years ago
Jf,fyu,eudyj,yudu.kjm,fj
dalvyx [7]

Answer:

Yes that is correct

Explanation:

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Explanation:

6 0
3 years ago
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Answer:

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Explanation:

Using the formula;

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λ = hc/E

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Using the colour wheel approach, if a complex absorbs blue light, then it will appear orange.

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