Hydrogen is used with oxygen flames for melting metals because it
Hydrogen is used with oxygen flames for melting metals because it
- A) involves a lot of heat when burnt
- B) combines explosively with oxygen
- C) is a very light gas
- D) is a rocket fuel
Correct Answer: A) involves a lot of heat when burnt
Explanation
Answer: Option A
Hydrogen is used with oxygen flames for melting metals because itinvolves a lot of heat when burnt. When hydrogen burns in the presence of oxygen, it produces water as a byproduct and releases a significant amount of energy in the form of heat. This reaction is known as a combustion reaction and can be represented by the following equation:
\[ 2H_2 + O_2 \rightarrow 2H_2O + \text{energy (heat)} \]
The high heat produced by this reaction allows for efficient and effective melting of metals, making hydrogen-oxygen flames ideal for this purpose. This property of hydrogen is especially useful in industries such as welding and metal cutting, where high temperatures are required to melt and manipulate metals.