How much heat should be extracted from the water

Calculate how much heat must be removed from the water to turn it into ice. Answer the questions.

Calculated heat flux

Alustame mingisuguse nullist kõrgema algtemperatuuriga veega. Et sellest veest saaks jää, tuleb läbida kaks etappi. Esmalt jahutame vee $0$ kraadini. Nüüd külmutame selle, st eemaldame veest soojushulga, mis on võrdne selle sulamissoojusega.

Lõpptulemuseks on soojushulk, mis on nende kahe soojushulga summa.

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Calculator: amount of heat during heating and cooling of bodies

The calculator calculates the amount of heat required to heat bodies from a substance or the amount of heat released when they cool down, using the formula $Q = c m Δ t$ . When using the calculator, enter the data in the table. The answer appears in the last row of the table.

Specific heat $c$ of matter	$\frac{J}{^{\circ} C \cdot k g}$
Mass $m$	$k g$
Initial temperature $t_{1}^{\circ}$	$^{\circ} C$
Final temperature $t_{2}^{\circ}$	$^{\circ} C$
Temperature change $Δ t$	$^{\circ} C$
Internal energy change $Q = c m Δ t$	$J$ *

* A negative result indicates that the internal energy of the body decreased. A positive result indicates that the internal energy of the body increased.

The table shows the specific heats of several well-known substances.

Calculator: heat of fusion

Kalkulaator arvutab ainete sulamiseks kuluva või tahkumisel eralduva soojushulga. Kalkulaatori kasutamisel sisesta tabelisse andmed. Vastus ilmub tabeli viimasesse ritta.

Aine sulamissoojus $λ$	$\frac{k J}{k g}$
Mass $m$	$k g$
Sulamiseks kuluv/tahkumisel eralduv soojushulk $Q = λ m$	$J$

Levinumate ainete sulamissoojused.

Final result

When water is cooled to the solidification temperature, the following is emitted ( $Q_{cooling}$ )	$J$
Freezing water releases (TeX parse error: Extra open brace or missing close brace)	$J$
Total amount to be removed ( $Q_{t} e x t f r e e z i n g + Q_{t} e x t f r e e z i n g$ )	$_{m} a t h r m J$

What do we say about this

Näeme, et vee jahutamiseks $0$ kraadini kulub üldiselt palju vähem aega kui $0$ kraadi juures oleva vee külmutamiseks. Seda seetõttu, et vee sulamissoojus on väga suur. Seda asjaolu tasub tähele panna nii külmikus oleva vee jäätumist oodates kui ka järgnevates töölehtedes vett külmutades.

Specific heats of some substances

Mõnede ainete sulamissoojused