3 years ago

Does any of these combinations have a change

1 answer:

7 0

In the following, you're supposed to keep the law of conservation of mass in place, so, there would be no change in mass. Recall the law: In a chemical reaction, mass is conserved.

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Which of the following would indicate that a chemical change might be occurring?

vitfil [10]

D. Is the best indicator for a chemical change.

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4 years ago

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Is this a chemical reaction?

Paraphin [41]

Answer:

I dont think so.

Explanation:

A chemical reaction is when there is a change in the substance. For example fizzing, bubbling, and changing colors are all examples of a chemical reaction.

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3 years ago

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Consider the reactionI2(g) + Cl2(g)2ICl(g)Using standard thermodynamic data at 298K, calculate the entropy change for the surrou

Georgia [21]

We know,

$\Delta H_{I_2(g)}=62.438\ KJ/mol\\\\\Delta H_{Cl_2(g)}= 0.0\ KJ/mol\\\\\Delta H_{ICl(g)}=17.78\ KJ/mol$

For given reaction, $I_2(g)+Cl_2(g)\ -->\ 2ICl(g)$

$\Delta H_{rxn}=2\Delta H_{ICl(g)}-\Delta H_{I_2(g)}-\Delta H_{Cl_2(g)}\\\\\Delta H_{rxn}=2(17.78)-0-62.438\ KJ/mol\\\\\Delta H_{rxn}=-26.878\ KJ/mol$