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2 years ago

6

Which event is an example of an endothermic reaction?.

1 answer:

g100num [7]2 years ago

7 0

For a reaction to be endothermic we have a process where heat is absorbed from a product and the end result is the product being colder than it originally was.

An event that can be a good practical example is using an ice pack on your arm. Your arm is warm before an ice pack is applied. After you apply an ice pack and leave it there for a while and then take it off, the site where the ice pack was would be colder than it was before the ice pack. Hope this helps!

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How might someone dispute the results of your investigation? How might you counter the argument?

erik [133]

Someone may think the results are wrong you can fight with them through words or the use of hands in which you can toss them

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2 years ago

One side of a plane wall is held at 200°C while the other side is exposed to a convective environment having T10°C and h 100 W/m

adelina 88 [10]

Answer:

$\frac{\dot Q}{A} = 151.33 W/m^2$

$T_c = 25.153°C$

Explanation:

Given data:

one side wall temperature 200°C

other side wall temperature 10°C

h = 100 W/m^2 °C

k = 2.6W/m °C

wall thickness L = 30 cm

we know that heat flux is given as

$\frac{\dot Q}{A} = \frac{ T_A - T\infty}{\frac{L}{K} + \frac{1}{h}}$

$\frac{\dot Q}{A} = \frac{ 20- 10} {\frac{0.30}{2.6} + \frac{1}{100}}$

$\frac{\dot Q}{A} = 151.33 W/m^2$

$1515.33 W/m^2 = \frac{ T_A - T_c}{\frac{L}{K}}$

solving for temperature for cold surface is given as

$T_c = -1515.33 \times \frac{0.3}{2.6} + 200$

$T_c = 25.153°C$

8 0

3 years ago

If the same index fossils are found in different rock strate miles apart, what is probably true about the rock layers?

vodka [1.7K]

Answer:

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Explanation:

6 0

3 years ago

How many moles of silver chloride are produced from 15.0 moles of silver nitrate

Ghella [55]

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3 years ago

The client's lab values are sodium 166 mEq/L, potassium 5.0 mEq/L, chloride 115 mEq/L, and bicarbonate 35 mEq/L. What condition

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Using the above mentioned data

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Therefore the Anion gap = 21mEq/L

5 0

3 years ago