<u>Answer:</u>
<em>
heat is released by the combustion of 
of methane</em>
<u>Explanation:</u>
The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).
![\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]](https://tex.z-dn.net/?f=%5CDelta%20H%20%5C%20reaction%3D%5B%202%28%5CDelta%20HfCO_2%29%2B%204%28%5CDelta%20HfH_2O%29%5D-%5B2%28%5CDelta%20HfCH_4%29%2B4%28%5CDelta%20HfO_2%29%5D)
=![2 ( -(393.5 KJ)/mol)-[2( -74.6 KJ/mol)+4(-241.82 KJ/mol)]](https://tex.z-dn.net/?f=2%20%28%20-%28393.5%20KJ%29%2Fmol%29-%5B2%28%20-74.6%20KJ%2Fmol%29%2B4%28-241.82%20KJ%2Fmol%29%5D)
![= -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]](https://tex.z-dn.net/?f=%3D%20-787%20KJ%2Fmol-%5B%20-149.2%20KJ%2Fmol-967.28%20KJ%2Fmol%5D)
<em>In this question, </em><em>the enthalpy of formation</em><em> has positive value and hence the </em><em>reaction is endothermic</em><em> in which the heat is released.
</em>
Wait no i know what it is its the Liverwort. Yes its that.
The first step is to identify the problem. There are factors to consider in keeping a plant or a tree healthy. These include water, oxygen, sunlight, soil, nutrients, climate, and other environmental conditions. If the environment seems to suit the other trees in the garden, ruling out other factors can be useful in determining why only one tree seems to be unhealthy. Once the problem is identified, a scientific investigation must be done to gather data and pieces of evidence which can explain why this event actually occurred. One of the best ways to gather evidence is through observing the tree and checking other signs which might identify if the tree is diseased. Once the gathered data are analyzed and the cause is identified, proceed in thinking of ways on how to solve it. In seeking a solution, it is best to ask information from experts and proper authorities.
<h3>1.The correct answer is:</h3><h3>b.earthquake</h3><h3>Explanation:</h3>
An earthquake is created by tectonic plates becoming united and placing a force on the ground. The tension grows so great that rocks give way by cutting and driving along fault extensions.
<h3>2.The correct answer is:</h3><h3>These mountains likely formed from compression.</h3><h3>Explanation:</h3>
Mountain embodiment relates to the geological methods that hold the extension of mountains. Various aerial enduring continental margins various reasonable share the identical mechanism of uplift. where folding is created by horizontal compression operating on a thin to the thick crust development zone .
<h3>3.The correct answer is:</h3><h3>formed when crust pulled apart
</h3><h3>
formed at a divergent boundary
</h3><h3>
formed when tectonic plates separated </h3><h3>Explanation:</h3>
The Rift Valley was created by powerful subterranean oppression that ripped aside the earth's crust. These powers prompted huge parts of the crust to decline between parallel lapse lines and drive up the molten stone in volcanic explosions.
<h3>4.The correct answer is:</h3><h3>expanding gases</h3><h3>Explanation:</h3>
As they rise, gas particles in the magma arise out of suspension and make bubbles and as the bubbles rise they expand. Eventually, the pressure from these bubbles is greater than the enclosing solid rock and this neighboring rock fissures, letting the magma to get to surface.
