Answer:
Water, in either liquid or solid form, is often a key agent of mechanical weathering. For instance, liquid water can seep into cracks and crevices in rock. If temperatures drop low enough, the water will freeze. ... This specific process (the freeze-thaw cycle) is called frost weathering or cryofracturing.
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Answer:
The value of K at this temperature = 2.25
Explanation:
According to question the equilibrium reaction is
H₂(g) + I₂(g) ⇄ 2 HI(g)
Initial concentration 2 2 8
At equilibrium 2 + 2x 2 + 2x 8 - 2x
At equilibrium concentration of HI changes to become 6 Molar
So 8 - 2x = 6
or, x = 1
So concentration of H₂ = 2 + 2 x 1 = 4 molar
concentration of I₂ = 2 + 2 x 1 = 4 molar
Kc =
⇒ Kc =
⇒ Kc = = 2.25
Answer:
The order is
Quartz > Calcium > Ammonia > Chlorine
Explanation:
Among given compounds
Quartz is a covalent compound with extensive bondings and thus it will have highest melting point
Calcium is a metal so it will have strong metallic bonds thus will have high melting point, however less than quartz.
ammonia is a polar molecule with weak hydrogen bond as intermolecular interactions thus will have higher melting point than chlorine
chlorine is a non polar molecule with weak intermolecular london dispersion forces.