Chemistry, 23.09.2019 13:30, jcduarte

Jan is holding an ice cube. what causes the ice to melt? thermal energy from the ice is transferred to the air. thermal energy from jan’s hand is transferred to the ice. the air absorbs thermal energy from jan’s hand. jan’s hand absorbs thermal energy from the ice.

Answers: 2

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answered: MilkTea1

Ice is melting due to the transfer of thermal energy from Jan's hand to ice.

Explanation: The melting of ice is a physical change and is happening when the thermal energy from Jan's hand is transferred to ice. Due to this energy transfer, the particles of ice starts to move faster and hence, making the ice melt.

In this, the physical state of ice is changing from solid to liquid state.

$H_2O(s)\rightleftharpoons H_2O(l)$

answered: macybarham

Option (b) is the correct answer.

Explanation:

The energy of an atom or substance because of the motion of its particles is known as thermal energy.

So, when Jan is holding an ice cube, then due to the transfer of thermal energy from Jan's hand the ice, molecules of ice will start to move rapidly and thus, ice will start to melt.

That is, solid state of water (ice) will change into liquid state.

Thus, we can conclude that when Jan is holding an ice cube then ice melts because thermal energy from Jan’s hand is transferred to the ice.

answered: Guest

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is $1s^{2}2s^{2}2p^{6}3s^{1}$ and electronic configuration of phosphorous is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$ .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

$3na + p \rightarrow na_{3}p$

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.