Which of the following processes is(are) considered spontaneous ?
I. Melting ice cubes at - 5 ° C and 1 atm.
II. Alignment of iron fillings in a magnetic field.
III. Formation of CH₄ and O₂ from CO₂ and H₂O at 1 atm and 25 ° C.

Question

Quizplus · Accepted Answer

The alignment of iron fillings in a magnetic field is spontaneous as it occurs naturally without external energy input. Melting ice at -5°C is not spontaneous as it requires energy input, and the formation of CH4 and O2 from CO2 and H2O is not spontaneous under standard conditions as it requires energy input.

Which of the Following Processes Is(are) Considered Spontaneous