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ludmilkaskok [199]
3 years ago
7

When 1.0 mole of MgSO4 is dissolved in water contained in a calorimeter, the temperature of the water and dissolved ions increas

es. Therefore the sign of ΔH for this reaction is ________, heat is transferred ________ the system ________ the surroundings, and the reaction is classified as ________.
Chemistry
1 answer:
KatRina [158]3 years ago
4 0

Answer: negative , from , to , exothermic

Explanation:

An endothermic reaction is a type of chemical reaction in which energy is absorbed from the surrounding. The temperature of the surrounding decreases.

An Exothermic reaction is a type of chemical reaction in which energy is released into the surrounding. The temperature of the surrounding increases.

Endothermic reactions are those in which heat is absorbed by the system from the surroundings and exothermic reactions are those in which heat is released by the system to the surroundings. \Delta H  for Endothermic reaction is positive and  

As on dissolution of salt, the temperature of water increases, the heat has been released from system into surroundings and thus \Delta H is negative.

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S_A_V [24]

Temperature and salinity changes the density of water.

<h3>Effect of Temperature and salinity on water</h3>

Temperature and salinity directly affect density of water. Water that low temperature is more denser than water that has high temperature while on the other hand, Freshwater which has no salt is less denser than seawater which has more salt concentration so we can conclude that temperature and salinity changes the density of water.

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3 0
3 years ago
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Answer:

FALSE

Explanation:

false. kinematics equations are used for many purposes.it is used to drive equations and to find the motion of an object. but it is used more in physics rather than maths.

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3 years ago
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If two gases a and b in separate 1 liter containers
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The pressure exerted when both gases are put together in a single 1 liter container is 5 atm.

<h3>What is pressure?</h3>

Pressure is the force exerted by any object on another object.

Given that, a and b separate 1 liter containers and exert pressure of 2 atm and 3 atm respectively.

When both gases a and b exert together, the pressure then

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Thus, the pressure exerted when both gases are put together in a single 1 liter container is 5 atm.

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7 0
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Answer:

it is 7

Explanation:

dogs are 7 HOPE THIS HELPED kidding i don get the question

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Answer:

Electrons

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