krit.club logo

A Journey through States of Water - What are the Different States of Water?

Grade 6CBSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

•

Water is a unique substance that exists in three physical states on Earth: Solid, Liquid, and Gas.

•

Solid State: In this state, water is known as ice. It has a definite shape and volume. Water turns into ice at the freezing point of 0∘C0^\circ C.

•

Liquid State: This is the most common form of water. It has a definite volume but no definite shape, taking the shape of the container it is in.

•

Gaseous State: Water in the form of vapor or steam is its gaseous state. It has neither a definite shape nor a definite volume. Water turns into vapor at its boiling point of 100∘C100^\circ C.

•

Melting: The process by which ice (solid) changes into water (liquid) upon heating (Solid→LiquidSolid \rightarrow Liquid).

•

Evaporation: The process of conversion of water (liquid) into water vapor (gas) on heating (Liquid→GasLiquid \rightarrow Gas).

•

Condensation: The process of conversion of water vapor (gas) into liquid water on cooling (Gas→LiquidGas \rightarrow Liquid).

•

Freezing: The process of conversion of liquid water into ice (solid) on cooling (Liquid→SolidLiquid \rightarrow Solid).

📐Formulae

H2OH_2O

0∘C (Freezing Point of Water)0^\circ C \text{ (Freezing Point of Water)}

100∘C (Boiling Point of Water)100^\circ C \text{ (Boiling Point of Water)}

Solid⇌FreezingMeltingLiquid⇌CondensationEvaporationGas\text{Solid} \xrightleftharpoons[\text{Freezing}]{\text{Melting}} \text{Liquid} \xrightleftharpoons[\text{Condensation}]{\text{Evaporation}} \text{Gas}

💡Examples

Problem 1:

Calculate the difference between the boiling point and the freezing point of water in degrees Celsius.

Solution:

100−0100\begin{array}{r} 100 \\ - 0 \\ \hline 100 \end{array}

Explanation:

The boiling point of water is 100∘C100^\circ C and the freezing point is 0∘C0^\circ C. The difference is 100∘C100^\circ C.

Problem 2:

If a beaker of water is at 85∘C85^\circ C, how many more degrees must the temperature rise to reach the boiling point?

Solution:

100−8515\begin{array}{r} 100 \\ - 85 \\ \hline 15 \end{array}

Explanation:

Since water boils at 100∘C100^\circ C, we subtract the current temperature (85∘C85^\circ C) from the boiling point to find the required increase, which is 15∘C15^\circ C.

Problem 3:

Identify the state of water at −10∘C-10^\circ C.

Solution:

Solid (Ice)

Explanation:

Since −10∘C-10^\circ C is below the freezing point of 0∘C0^\circ C, water exists in its solid state.