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Anettt [7]
3 years ago
14

How do you know if the reaction is exothermic

Chemistry
1 answer:
MArishka [77]3 years ago
5 0
Hey there!
Exothermic reactions release heat, causing its temperature to fall. If the reaction is lessening the temperature of the object while releasing all the heat, then you know that the reaction is indeed exothermic. Hope this helps!
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How many joules of heat are required to heat 100.0g of room temperature water to the boiling point
Yuri [45]

Answer:

To convert 100.0 g of water at 20.0 °C to steam at 100.0 °C requires 259.5 kJ of energy. Let me know if this helped?

4 0
2 years ago
The kinetic-molecular theory of gases says A. the particles of a gas move independently of each other. B. the particles in a gas
Korolek [52]

Answer:

D. all of the above.

Explanation:

The kinetic-molecular theory of gases suggests that; the particles of a gas move independently of each other, the particles in a gas move rapidly, the particles in a gas are far apart.

Hope it helps.

5 0
3 years ago
What is the significance of "Er" in the diagram?
Drupady [299]

Answer:

The significance of "Er" in the diagram is :

B.) Threshold energy for reaction

Explanation:

Threshold energy : It is total amount of energy required by the reactant molecule to reach the transition state .

Activation energy : It is the excess energy absorbed by the molecules to reach the transition state.

<u>Activation Energy = Threshold Energy - Average Kinetic Energy</u>

<u>This means Activation energy decreases on increasing kinetic energy</u>

On increasing Temperature average kinetic energy of the molecule increases which reduces the activation energy and the reaction occur faster in that case.

Catalyst also reduces the Activation energy.

<u>Er = Threshshold energy for reaction at 30 degree</u>

<u>Ea = Activation Energy</u>

<u>The given figure shows that the threshold energy decreases on increasing the temperature</u>

<u>Only the molecule having energy greater than Er can react to form product</u>

3 0
3 years ago
Read 2 more answers
How much precipitation is shown in the rain gauge below?
VARVARA [1.3K]

Answer: b

Explanation:

7 0
2 years ago
Can someone help me with #35,37,39,41 please
adoni [48]
35 b.
37 h
39 i
41 d
hope that helps
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