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asambeis [7]
3 years ago
14

Calculate the amount of heat lost by 23 g of water when its temperature drops from 68.0°C to 31.0°C. The specific heat of water

is 4.18 J/(g°C).
Chemistry
1 answer:
34kurt3 years ago
8 0

Answer:

3557J is the heat lost by the water

Explanation:

Using the equation:

Q = m*C*ΔT

<em>Where Q is change in heat</em>

<em>m is mass of substance (23g of water)</em>

<em>C is specific heat of the substance (4.18J/g°C)</em>

<em>And ΔT is change in temperature (68.0°C - 31.0°C = 37.0°C)</em>

<em />

we can find the amount of heat lost as follows:

Q = 23g*4.18J/g°C*37°C

Q =

3557J is the heat lost by the water

<em />

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8 0
3 years ago
Decide whether a chemical reaction happens in either of the following situations. If a reaction does happen, write the chemical
sineoko [7]

Explanation:

A strip of solid palladium metal is put into a beaker of nicl2

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To answer this question properly you must refer to the reactivity series.

The activity series is a chart of metals listed in order of declining relative reactivity. The top metals are more reactive than the metals on the bottom.

In this series, Nickel is higher than Palladium. This means that if a Palladium strip is placed into a solution of a Ni salt, then a reaction will not take place, nothing would happen.

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3 years ago
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6 0
3 years ago
2. Calculate the mass of K in 90g of KOH​
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3 years ago
how did the boiling point of plain water compare to that of water with salt? Compared to water with sugar?
elixir [45]

The boiling point of plain water is less than the boiling point of both salt and sugar water.

<h3>What is boiling point?</h3>

Boiling point can be defined as the point when the pressure exerted by the surroundings upon a liquid is equal to the pressure exerted by the vapour of the liquid.

The boiling point of plain water is 100°C which increases upon addition of solute substances such as salt and sugar.

But salts are usually made up of ionic bonds while sugar are made up of covalent bonds. This means that more energy would be required to boil salt solution due to its ionic bonds.

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