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umka21 [38]
3 years ago
10

How to tell if an equation is exothermic or endothermic?

Chemistry
1 answer:
levacccp [35]3 years ago
3 0
The standard enthalpy change of a reaction is positive thus endothermic.

The standard enthalpy change of a reaction is negative thus exothermic.

Hope it helped!
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What is the physical property to all of these (pls answer I’ll give brainliest)
Sav [38]

Answer:

Explanation:

Brittleness : The ability of an object to break apart or shatter easily

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Lustre: the ability of an object to reflect light.

Malleability is a substance's ability to deform under pressure

The melting point of ice is 0°C. The melting point of a solid is the same as the freezing point of the liquid

Solubility is the relative ability of a solute to dissolve into a solvent.

solid: Has a definite shape and volume.

liquid: Has a definite volume, but take the shape of the container.

gas: Has no definite shape or volume. change of state

The resistance of a liquid to flowing is its viscosity.

Let me Know if i missed somethin!!! :) Hope this Helped!!!

4 0
3 years ago
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3 years ago
What different physical property allows the distillation method to work?
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Distillation is a widely used method for separating mixtures based on differences in the conditions required to change the phase of components of the mixture. To separate a mixture of liquids, the liquid can be heated to force components, which have different boiling points , into the gas phase .

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4 years ago
What is the size comparison between earth & mars
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Explanation:

3 0
4 years ago
Describe the benefits and the drawback of natural gas.
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When looking to power your equipment or vehicle with natural gas, the first question that springs to mind is: what is natural gas? A lot of people use natural gas in their homes for cooking and heating, but they don’t really give it some thought. So, let’s see what natural gas is and how it’s different from other forms of fossil fuels like oil and coal.

Natural Gas is a fossil fuel that exist in a gaseous state and is composed mainly of methane (CH4) a small percentage of other hydrocarbons (e.g. ethane). The use of natural gas is becoming more and more popular as it can be used with commercial, industrial, electric power generation and residential applications.


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