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Arte-miy333 [17]
3 years ago
15

As a phase change occurs when energy is removed or added to a system, the temperature of the substance stays constant because

Chemistry
1 answer:
Rashid [163]3 years ago
5 0

Answer:

energy is being used to make or break bonds between molecules

Explanation:

if correct please consider brainliest

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Give the ΔH value for the decomposition of silver chloride as shown in the reaction 2AgCl(s)+127 kJ→2Ag(s)+Cl2(g).
choli [55]

Answer: \Delta H=+127kJ

Explanation:

2AgCl(s)+127kJ\rightarrow 2Ag(s)+Cl_2(g)  

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and \Delta H for the reaction comes out to be negative.

Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and \Delta H for the reaction comes out to be positive.

As the heat is absorbed the reactants , the reaction is endothermic and \Delta H for the given endothermic reaction will be +127 KJ

6 0
4 years ago
Why are paperclips attracted to magnets?
choli [55]
Iron. Well actually steel, but iron is the closest.
3 0
3 years ago
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When a substance gains electrons in a chemical reaction, the substance is said to be activated. dissociated. reduced. oxidized?
vlada-n [284]
Reduced is the right answer. You can remember it like that if it gains electron that means it will turn negative or will get reduced nuber. So itis reduction
Ihope it will help:)
3 0
3 years ago
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Ammonia (NH3) reacts with oxygen (O2) to produce nitrogen monoxide (NO) and water (H2O). Write and balance the chemical equation
bekas [8.4K]

Answer:

There is 1.6 L of NO produced.

Explanation:

I assume you have an excess of NH3 so that O2 is the limiting reagent.

<u>Step 1:</u> Data given

2.0 liters of oxygen reacts with ammonia

<u>Step 2:</u> The balanced equation

4NH3 + 5O2 → 4NO + 6H2O

For 4 moles of NH3, we need 5 moles of O2 to produce 4 moles of NO and 6 moles of H2O

Consider all gases are kept under the same conditions for pressure and temperature, we can express this mole ratio in terms of the volumes occupied by each gas.

This means:  when the reaction consumes  4  liters of ammonia (and 5 liters of oxygen) it produces  4  liters of nitrogen  monoxide

Now, when there is 2.0 liters of oxygen consumed, there is 4/2.5 = 1.6 L of nitrogen monoxide produced.

There is 1.6 L of NO produced.

4 0
3 years ago
Give one source of chlorine gas
snow_lady [41]

Answer:

Sodium chloride

Sodium chloride is by a huge margin the most common chlorine compound, and it is the main source of chlorine and hydrochloric acid for the enormous chlorine-chemicals industry today.

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3 years ago
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