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2 years ago

In order to break water into hydrogen and oxygen, water is heated to more than 500°C. Which kind of reaction is this and

Chemistry

1 answer:

N76 [4]2 years ago

4 0

It is exothermic because heat needs to be released by the reactants to form the products.

<h3>Splitting of water molecules</h3>

Water molecule is made up of two atoms of hydrogen and one atom of oxygen. That is H2O.

An exothermic reaction is the reaction in which energy, in the form of heat, is released into the environment. Some examples of exothermic reaction are:

Splitting of water molecules

Rusting of iron and

Burning of sugar.

Splitting of water molecule involves a process called thermal dissociation reaction which uses high temperature to split water molecules into its two components such as hydrogen and oxygen.

Here, the reactants absorbs the heat which is needed to form the products.

Learn more about exothermic reaction here:

brainly.com/question/13892884

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3 years ago

A 45-g aluminium spoon(specific heat 0.80 / J/gdegree Celsius) at 24 degree celsius is placed in 180 ml(180 grams) of coffee at

Vlad [161]

Explanation:

a) The amount of heat released by coffee will be absorbed by aluminium spoon.

Thus, $heat_{absorbed}=heat_{released}$

To calculate the amount of heat released or absorbed, we use the equation:

$Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})$

Also,

$m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]$ ..........(1)

where,

q = heat absorbed or released

$m_1$ = mass of aluminium = 45 g

$m_2$ = mass of coffee = 180 g

$T_{final}$ = final temperature = ?

$T_1$ = temperature of aluminium = $24^oC$

$T_2$ = temperature of coffee = $85^oC$

$c_1$ = specific heat of aluminium = $0.80J/g^oC$

$c_2$ = specific heat of coffee= $4.186 J/g^oC$

Putting all the values in equation 1, we get:

$45 g\times 0.80J/g^oC\times (T_{final}-24^oC)=-[180 g\times 4.186J/g^oC\times (T_{final}-83^oC)]$

$T_{final}=80.30^oC$

80.30 °C is the final temperature.

b) Energy flows from higher temperature to lower temperature.Whenever two bodies with different energies and temperature come in contact. And the resulting temperature of both bodies will less then the body with high temperature and will be more then the body with lower temperature.

So, is our final temperature of both aluminium and coffee that is 80°C less than initial temperature of coffee and more than the initial temperature of the aluminum.

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3 years ago