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Nostrana [21]
3 years ago
11

Ethanol boils at 78.4 °C with \DeltaΔHvap = 38.6 kJ/mol. A 0.200-mol sample of ethanol is heated from some colder temperature up

to 78.4 °C, which requires 1.05 kJ of heat, and then vaporized. What will be the total amount of heat required (for both the heating and the vaporizing)?
Chemistry
1 answer:
NNADVOKAT [17]3 years ago
4 0

Answer:

Q_T=8.77kJ

Explanation:

Hello,

In this case, the total heat is computed via:

Q_T=n*\Delta H_{vap}+1.05 kJ\\

It means, by adding all the involved heat, which simply result:

Q_T=0.200mol*38.6 kJ/mol+1.05 kJ\\Q_T=8.77kJ

Thus, such heat must be provided to the ethanol, that is why it remains positive.

Best regards.

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Answer:

Answer: No. An ore is a rock having large amounts of a mineral. Minerals may or may not be commercially useful.

3 0
3 years ago
The length of the school's gymnasium is 30 meters long. How many centimeters long is the school's gymnasium​
aleksley [76]

Answer:

The answer to your question is: 3000 cm

Explanation:

30 meters long to cm

We can use a rule of three to solve it

We know that              1 meter ------------------  100 cm

                                  30 meters ----------------    x

                               x = 30(100)/1 = 3000 cm

5 0
3 years ago
Read 2 more answers
A engineer measures the peak power output is 0.3227MW what is the peak power output in kilowatts ?
Lana71 [14]
<h3>Answer:</h3>

322.7 kW

<h3>Explanation:</h3>
  • Power refers to the rate at which work is done.
  • Therefore; Power = Work done ÷ time
  • It is measured in joules per seconds or Watts

In this case, we are required to convert 0.3227 MW to kilowatts

We need to know that;

  • 10^6 watts = 1 Megawatts(MW)
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Therefore;

10^3 kW = 1 MW

Therefore, the suitable conversion factor is 10^3kW/MW

Hence;

0.3227 MW is equivalent to;

   = 0.3227 MW × 10^3kW/MW

   = 322.7 kW

Thus, the peak power output is 322.7 kW

3 0
2 years ago
Which statement best describes the whether shown by the purple combination of semicircles and triangles on a line on a weather m
iren2701 [21]
It seems that you have missed to attach the given map and options for us to answer this question, so I had to look for it. Anyway, here is the answer. The statement that best describes the whether shown by the purple combination of semicircles and triangles on a line on a weather map is a <span>cold front can cause heavy rain, thunder, and lightning. Hope this helps.</span>
3 0
3 years ago
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Bleach is a 0.750 M solution of sodium hypochlorite. What volume, in litres, would contain 120.3 g of sodium hypochlorite?
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Answer:

2.15 L

Explanation:

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120.3 g *1 mol/74.5 g = 1.615 mol NaOCl

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1.615 mol * 1L/0.750 mol = 2.15 L

4 0
3 years ago
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