Matter in Our Surroundings_SA_2

Why does the temperature of a substance remain constant during its melting point or boiling point? What is the first statement of the video clip?

• Change of state and specific latent heat: specific latent heat is the amount of heat energy required to change the state of a unit mass of a substance without change in temperature

• The word latent means dormant or concealed

• Let’s perform an activity to find out why the heat energy required to bring about a change of state is called latent heat

• Take some ice cubes in a beaker suspend a thermometer into the ice cubes and note its temperature

• The temperature is zero degrees centigrade

Why does the temperature of a substance remain constant during its melting point or boiling point? What is the second statement of the video clip?

• Heat the ice cubes

• The word latent means dormant or concealed

• Let’s perform an activity to find out why the heat energy required to bring about a change of state is called latent heat

• Take some ice cubes in a beaker suspend a thermometer into the ice cubes and note its temperature

• The temperature is zero degrees centigrade

Why does the temperature of a substance remain constant during its melting point or boiling point? What is the third statement of the video clip?

• Heat the ice cubes

• Record the temperature after every minute

• Let’s perform an activity to find out why the heat energy required to bring about a change of state is called latent heat

• Take some ice cubes in a beaker suspend a thermometer into the ice cubes and note its temperature

• The temperature is zero degrees centigrade

Why does the temperature of a substance remain constant during its melting point or boiling point? What is the Fourth statement of the video clip?

• Heat the ice cubes

• Record the temperature after every minute

• Take some ice cubes in a beaker suspend a thermometer into the ice cubes and note its temperature

• Take some ice cubes in a beaker suspend a thermometer into the ice cubes and note its temperature

• The temperature is zero degrees centigrade

Why does the temperature of a substance remain constant during its melting point or boiling point? What is the Fifth statement of the video clip?

• Heat the ice cubes record

• Record the temperature after every minute

• Keep stirring the ice water mixture constantly so that the temperature is uniform throughout

• We observe that the thermometer reading remains constant at zero degree centigrade though heat is being constantly supplied

• The temperature is zero degrees centigrade

Why does the temperature of a substance remain constant during its melting point or boiling point? What is the Sixth statement of the video clip?

• Heat the ice cubes record

• Record the temperature after every minute

• Keep stirring the ice water mixture constantly so that the temperature is uniform throughout

• We observe that the thermometer reading remains constant at zero degrees centigrade though heat is being constantly supplied

• The temperature remains constant till the ice completely melts to water at zero degrees centigrade

Why does the temperature of a substance remain constant during its melting point or boiling point? What is the Seventh statement of the video clip?

• Continue heating water which is at zero degrees centigrade

• Record the temperature after every minute

• Keep stirring the ice water mixture constantly so that the temperature is uniform throughout

• We observe that the thermometer reading remains constant at zero degrees centigrade though heat is being constantly supplied

• The temperature remains constant till the ice completely melts to water at zero degrees centigrade

Why does the temperature of a substance remain constant during its melting point or boiling point? What is the Eighth statement of the video clip?

• Continue heating water which is at zero degrees centigrade

• We observe that the temperature is increasing

• Keep stirring the ice water mixture constantly so that the temperature is uniform throughout

• We observe that the thermometer reading remains constant at zero degrees centigrade though heat is being constantly supplied

• The temperature remains constant till the ice completely melts to water at zero degrees centigrade

Why does the temperature of a substance remain constant during its melting point or boiling point? What is the Ninth statement of the video clip?

• Continue heating water which is at zero degrees centigrade

• We observe that the temperature is increasing

• Record the rise in temperature till the water starts boiling

• We observe that the thermometer reading remains constant at zero degrees centigrade though heat is being constantly supplied

• The temperature remains constant till the ice completely melts to water at zero degrees centigrade

Why does the temperature of a substance remain constant during its melting point or boiling point? What is the Tenth statement of the video clip?

• Continue heating water which is at zero degrees centigrade

• We observe that the temperature is increasing

• Record the rise in temperature till the water starts boiling

• Continue heating the boiling water gets converted to steam

• The temperature remains constant till the ice completely melts to water at zero degrees centigrade