Maddelerde sırasıyla meydana gelen değişimler aşağıda verilmiştir. X maddesi: Eritilme Şekil verilme Paslanma
Y maddesi: Mayalanma Kaliba koyma Pişirilme
Z maddesi: Olgunlaşma Dillmierne - Küflenme

Bu değişimlere göre aşağıdaki ifadelerden hangisi

yanlıştır?

A) X maddesinde 2 fiziksel, 1 kimyasal değişim
Gerçekleşmiştir

B) Y maddesinde 2 kimyasal 1 fiziksel değişim

gerçekleşmiştir
C) Z maddesinde 2 fiziksel, 1 kimyasal değişim

gerçekleşmiştir.
D X, Y ve Z maddelerinin son değişimleri kimyasaldur.​

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.