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Furkat [3]
2 years ago
9

A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. This flame is used to melt a metal. Which

energy transformation represents this process?
chemical energy into thermal energy
kinetic energy into potential energy
kinetic energy into electromagnetic energy
potential energy into chemical energy
Chemistry
1 answer:
NISA [10]2 years ago
5 0

Answer:

chemical energy into thermal energy

Explanation:

The reaction taking place is as follows

2C₂H₂ + 5O₂ = 4CO₂ + 2H₂O + Heat

In this reaction bonds present in acetylene is broken and new bond present in water and carbon dioxide are formed . In the whole process of bond breaking and bond formation , there is net loss of energy and that energy is released as heat energy .

Thus we can say that in the whole process , chemical energy is converted into heat energy .

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2 years ago
The acetylene tank contains 35.0 mol C2H2, and the oxygen tank contains 84.0 mol O2. How many moles of O2 are needed to react co
Masja [62]

 The moles   of O2 that are needed to react  completely  with 35.0  mol C2H2 is 87.5 moles  of O2


 <u><em>Explanation</em></u>

Write a balanced chemical  equation  for reaction of between C2H2 and O2

2 C2H2 + 5O2 →  4 CO2   + 2 H2O

if 35.0 moles C2H2  reacted then  use  the o mole ratio  to determine  the moles  of C2H2


The mole ratio  of C2H2 :O2 = 2:5 therefore the   moles of O2

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8 0
3 years ago
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