Is there any way to predict if a substance is flammable or not?

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In summary, the conversation discusses how to determine if a substance is flammable based on its physical and chemical properties. One way is by writing the chemical equation of combustion and observing the change in enthalpy. However, the word "flammable" can be subjective and there are other factors such as flash point and autoignition temperature that also play a role.
  • #1
tsuwal
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You know that some classes of compounds are flammable like alkanes but is there any other based to know based on other physical and chemistry properties? Probabibly the only way is writing the chemical equation of combustion and see if the change of entalpy is high..
 
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  • #2
Looks like you answered your own question.:)
 
  • #3
Flamable is quite a subjective word. I recently saw an interesting demonstration on TV of some people trying to burn newspaper in a low oxygen room. The level was high enough that the people were fine and didn't need oxygen masks - but low enough that they had great difficulty trying to set fire to the paper. The paper didn't appear to be flamable.
 
  • #5
thanks! you guys are awesome!
 

FAQ: Is there any way to predict if a substance is flammable or not?

1. What factors determine if a substance is flammable or not?

There are several factors that can determine if a substance is flammable, including its chemical composition, ignition temperature, and the presence of oxygen. The ability of a substance to release energy in the form of heat or light when exposed to a source of heat or flame is also a determining factor.

2. How can we predict if a substance will catch fire?

By understanding the properties of a substance and its reaction to different conditions such as heat, oxygen, and ignition sources, we can predict the likelihood of it catching fire. Additionally, chemical and physical tests can be performed to determine the flammability of a substance.

3. Can a substance be both flammable and non-flammable?

Yes, a substance can have varying degrees of flammability. Some substances may catch fire easily, while others may require specific conditions to ignite. It is important to understand the flammability of a substance in different forms, such as liquid, solid, or gas.

4. Are there any warning signs that a substance may be flammable?

Yes, there are some warning signs that can indicate a substance may be flammable, such as a strong odor, visible vapors, or a low flash point. However, it is important to always follow proper safety precautions and assume that any unknown substance may be flammable.

5. Can we accurately predict the flammability of all substances?

No, it is not possible to accurately predict the flammability of all substances. Some substances may have unknown properties or may react differently in certain conditions. It is important to always handle substances with caution and follow safety guidelines to prevent accidents.

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