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iris [78.8K]
3 years ago
9

Fire extinguishers that spray carbon dioxide on the fire, work very effectively because it forms a blanket around the burning ma

terial. But these carbon dioxide extinguishers cannot be used for wood fires. Why?
a. The carbon dioxide blanket itself acts as a fuel and starts burning along with the wood.

b. The extinguished wood can retain enough heat inside the carbon dioxide blanket to re-ignite when the gas disappears.

c. In the presence of carbon dioxide from the extinguisher, the burning wood reacts with oxygen to release heat and make the fire worse.

d. Carbon dioxide reacts with wood to give carbon and oxygen; the oxygen makes the fire worse and the carbon burns along with the wood.
Chemistry
1 answer:
Arte-miy333 [17]3 years ago
8 0

Answer:

I think it will option B it will retain enough heat

You might be interested in
Why is graphite slippery when pressed? Select one: a. covalent bonds break b. hexagonal layers slide c. molecules of graphite sl
Ronch [10]

Answer:

hexagonal layers slide

Explanation:

The layers in graphite can slide over each other because the forces between them are weak. The delocalised electrons are free to move through the structure, so graphite can conduct electricity.This makes graphite slippery, so it is useful as a lubricant .

<em>i think it's right</em>

hope it helps :)

7 0
4 years ago
Of the following statements about water's latent heat and changes in state, which is/are true? choose all that apply.
postnew [5]

When water evaporates, its latent heat of evaporation absorbs heat.

<h3>What is Latent heat?</h3>

A body or thermodynamic system can release or absorb latent heat during a constant-temperature process, often a first-order phase transition.

There are two types of latent heat:

  1. The heat of freezing
  2. The heat of vaporization

The statements about water's latent heat and changes in state are:

  • The heat of freezing is the quantity of thermal energy produced as a liquid freezes, and the heat of vaporization is the quantity of thermal energy needed to change a liquid into a gas.
  • Water may move energy from one location to other thanks to latent heat.
  • There aren't any weak (hydrogen) bonds between water molecules in the vapor state.
  • Hurricanes are propelled by the latent heat of condensation, which occurs when water vapor condenses and turns into a liquid.
  • All water molecules in the solid state are connected by flimsy (hydrogen) bonds.

To learn more about latent heat, refer:

brainly.com/question/5401454

#SPJ4

4 0
2 years ago
How many joules of heat are absorbed to raise the temperature of 650 grams of water from 5.00c to it's boiling point, 100c
xenn [34]

Answer : The amount of heat absorbed are, 258485.5 J

Solution :

Formula used :

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

where,

Q = heat gained  = ?

m = mass of water = 650 g

c = specific heat of water = 4.186J/g^oC      

\Delta T=\text{Change in temperature} 

T_{final} = final temperature = 100^oC

T_{initial} = initial temperature = 5^oC

Now put all the given values in the above formula, we get the final temperature of copper.

Q=650g\times 4.186J/g^oC\times (100-5)^oC

Q=258485.5J

Therefore, the amount of heat absorbed are, 258485.5 J

7 0
3 years ago
How many moles of sulfur trioxide are formed from 3 moles of oxygen using the given
fiasKO [112]

Answer:

6 moles of SO₃ formed.

Explanation:

Given data:

Number of moles of SO₃ formed = ?

Number of moles of oxygen react = 3 mol

Solution:

Chemical equation;

2SO₂+ O₂      →   2SO₃

now we will compare the moles of oxygen and sulfur trioxide.

                             O₂            :            SO₃

                               1             :             2

                               3            :           2/1×3 = 6 moles

Thus, six moles of SO₃ will formed.

8 0
3 years ago
What is the frequency of light with an energy of 124 kJ/mol?
Charra [1.4K]

Answer: = 3.11 x 10^14 s^-1

Explanation:

Use the formula E = hv

This formula uses the assumption that the unit for energy is in Joules/photon.

124 kJ = 124000J

To get 124000J/mol into a unit of J/photons, we need to divide by the number of photons in a mole, which is 6.022 x 10^23.

And thus, we need

124000/6.022 x 10^23 = 2.06 x 10^-19J/photon

We can plug it in to E = hv by

2.06 x 10^-19J = (6.63 x 10^-34 J s)(v) Isolate v by

v = (2.06 x 10^-19J)/(6.63 x 10^-34 J s)

= 3.11 x 10^14 s^-1

6 0
3 years ago
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