Question

experiment to determine the melting point of an ice at different pressure class 9​

Answer 1

Explanation:

AIM

To determine the melting point of ice and the boiling point of water.

OBJECTIVE A

To determine the melting point of ice.

MATERIALS REQUIRED

Ice cubes, filter paper, beaker, wire gauze, tripod stand, burner, thermometer, stirrer, clamp stand.

THEORY

Ice is the solid form of H20. Its melting point is 0 °C i.e., the forces of interaction between the molecules in the solid form of H20 can be broken down at 0 °C and solid H20 gets converted into liquid water.

PROCEDURE

Take some ice cubes. Dry them using the filter paper and put them quickly in a beaker.

Place the beaker on a wire gauze kept over a tripod stand.

Suspend a thermometer, into the ice cubes, with the help of a clamp stand.

CBSE Class 9 Science Practical Skills - Melting Point of Ice and Boiling Point of Water 1

Heat the ice cubes and stir continuously for uniform heating.

Note the temperature (t1) when ice starts melting.

Heat continuously till ice melts completely. Note this temperature (t2).

Record your observations in the table.

OBSERVATIONS

Observation Table

CBSE Class 9 Science Practical Skills - Melting Point of Ice and Boiling Point of Water 2

Mean value of temperatures = t1+t22

Boiling point of water = ……………..°C.

RESULT

The melting point of ice =………… °C.

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