All categories

3 years ago

Compare the entropy of a firecracker before it is lighted to its entropy after it explodes

1 answer:

3 0

The entropy of a firecracker is much less before it explodes than afterwards.
Entropy is a measure of the degree of disorder in a system.
Before the explosion, everything is packed in a small volume inside a cardboard tube.
After the explosion, the contents have been converted largely to gases and finely divided solids spread over a large volume of the sky.
The latter situation is more disordered, so it has a higher entropy.

You might be interested in

So when dealing with molar mass when do you know to round up

aniked [119]

The first rule is to use four digits in atomic weights and consider the calculated formula or molar mass as given with four significant digits. This rule is appropriate for beginners but has some disadvantages.

The second rule is to use all digits in the recommended atomic weights and to estimate the accuracy of the result from the number of decimal places or significant digits in these.

The third rule is to use all digits in the recommended atomic weights and to calculate the absolute maximum uncertainty of the result from the recommended uncertainties of the atomic weights. The uncertainty is rounded up to one (two) significant digit(s), and the formula or molar mass is rounded to the same absolute accuracy as the rounded uncertainty.

8 0

3 years ago

Metallic behavior is generally associated with elements with partially filled p orbitals. elements with unpaired electrons. elem

Mila [183]

Answer:

Elements with low ionization energies.

Explanation:

The ionization energy of an atom reffers to the amount of energy that is required to remove an electron from the gaseous form of that atom or ion.

The greater the ionization energy, the more difficult it is to remove an electron. The ionization energybis one of the indicator that shows the reactivity of an element. Elements with a low ionization energy such as metals are usually reffered to as a reducing agents and form cations, this give metals the tendency to

give away their valence electrons when bonding, whereas non-metals tend to take electrons.

Metallic elements have different properties such as shiny, heat and electricity conductivity . They are malleable and ductile Some metals, such as sodium, are soft and can be cut with a knife. while some are very hard such as iron.

4 0

3 years ago

A 59.1 sample of aluminum is put into a calorimeter (see sketch at right) that contains of water. The aluminum sample starts off

Gemiola [76]

Answer:

Specific heat capacity of aluminium is 0,863 J/g°C

Explanation:

Values: 250g of water, aluminum sample starts off at 91.3°C, water starts off at 16.0°C, temperature of the water stops changing it's 19.5°C

In this problem, the heat produced for the aluminium is the same consumed by water. The heat consumed by water is:

Q = C×m×ΔT (1)

Where C is specific heat of water (4,184J/g°C), m is mass of water (250,0g) and ΔT is change in temperature of water (19,5°C-16,0°C = 3,5°C)

Replacing:

Q = 4,184J/g°C×250,0g×3,5°C

Q = 3661 J

Using (1), it is possible to obtain specific heat of aluminium, thus:

Q / (m×ΔT) = C

Where Q is heat (3661J), m is mass (59,1g) and ΔT is change in temperature (91,3°C - 19,5°C( = 71,8°C

Replacing:

3661J / (59,1g×71,8°C) = C

C = 0,863 J/g°C

I hope it helps!

4 0

3 years ago

A sample of air is slowly passed through aqueous Sodium hydroxide and then over heater copper.

faust18 [17]

A sample of air is slowly passed through aqueous Sodium hydroxide and then over heater copper Carbon dioxide and oxygen.

4 0

3 years ago

Read 2 more answers

What is the IMA of the 1 st class lever in the graphic given? 2 3 0.5

Zina [86]

Answer:

I believe the answer isT 2.

Explanation:

he formula for IMA of a first-class lever is effort-distance/resistance-distance.

6 0

3 years ago

Read 2 more answers