Welding is a process that is used to attach pieces of metal to one another. In a certain welding process, small pieces of Al (s) and CuO (s) are placed in a crucible and ignited, causing the following highly exothermicreaction to occur.2 Al+ 3 Cuo - 3 Cu + Al,O3The copper and aluminum oxide melt. The molten aluminum oxide floats to the top of the crucible. When the steel disk below the crucible melts, the molten copper flows into the weld cavity and welds the pieces of metaltogether as it cools and solidifies. The setup is represented in the following diagram.Mixture of Al(s)and CuO(s)CrucibleSteel DiskWeld CavityPieces ofMetal to BeConnected Which of the following best explains why the exothermic nature of the reaction is important to the welding process?The reaction absorbs heat, which causes the products to absorb additional heat, so they solidify in the weld cavity.The reaction absorbs heat, which is then absorbed by the products, so they melt and the molten copper flows into the weld cavity.The reaction releases heat, which causes the products to release additional heat, so they solidify in the weld cavity.The reaction releases heat, which is then absorbed by the products, so they melt and the molten copper flows into the weld cavity.

Which of the following best explains why the exothermic nature of the reaction is important to the welding process? The reaction absorbs heat, which causes the products to absorb additional heat, so they solidify in the weld cavity. The reaction absorbs heat, which is then absorbed by the products, so they melt and the molten copper flows into the weld cavity. The reaction releases heat, which causes the products to release additional heat, so they solidify in the weld cavity. D. The reaction releases heat, which is then absorbed by the products, so they melt and the molten copper flows into the weld cavity.

Which of the following best explains why the exothermic nature of the reaction is important to the welding process? The reaction absorbs heat, which causes the products to absorb additional heat, so they solidify in the weld cavity. The reaction absorbs heat, which is then absorbed by the products, so they melt and the molten copper flows into the weld cavity. The reaction releases heat, which causes the products to release additional heat, so they solidify in the weld cavity. D. The reaction releases heat, which is then absorbed by the products, so they melt and the molten copper flows into the weld cavity.

Welding: Principles and Applications (MindTap Course List)

8th Edition

ISBN:9781305494695

Author:Larry Jeffus

Publisher:Larry Jeffus

Chapter10: Gas Metal Arc Welding Equipment, Setup, And Operation

Section: Chapter Questions

Problem 4R: In short-circuiting transfer, what type of current alloys the liquid metal at the electrode tip to...

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Question

Welding is a process that is used to attach pieces of metal to one another. In a certain welding process, small pieces of Al (s) and CuO (s) are placed in a crucible and ignited, causing the following highly exothermic
reaction to occur.
2 Al+ 3 Cuo - 3 Cu + Al,O3
The copper and aluminum oxide melt. The molten aluminum oxide floats to the top of the crucible. When the steel disk below the crucible melts, the molten copper flows into the weld cavity and welds the pieces of metal
together as it cools and solidifies. The setup is represented in the following diagram.
Mixture of Al(s)
and CuO(s)
Crucible
Steel Disk
Weld Cavity
Pieces of
Metal to Be
Connected

Which of the following best explains why the exothermic nature of the reaction is important to the welding process?
The reaction absorbs heat, which causes the products to absorb additional heat, so they solidify in the weld cavity.
The reaction absorbs heat, which is then absorbed by the products, so they melt and the molten copper flows into the weld cavity.
The reaction releases heat, which causes the products to release additional heat, so they solidify in the weld cavity.
The reaction releases heat, which is then absorbed by the products, so they melt and the molten copper flows into the weld cavity.

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