Thermodynamics and Phase Changes

Julia Su Miller discusses the strange thermal behavior of ice and water, explaining how heat energy affects state changes without altering temperature. Through experiments, she demonstrates the melting and refreezing of ice under pressure and the use of salt to attach a string to ice. The video also pays tribute to scientists like Boltzmann, Carnot, Watt, Joule, and Maxwell for their contributions to the study of heat and temperature.

What is the initial temperature of the ice in the beaker before any heat is added?

• 0° Centigrade

• 100° Centigrade

• 50° Centigrade

• 10° Centigrade

How many calories are required to convert 1 gram of ice at 0° Centigrade to ice water at the same temperature?

• 540 calories

• 100 calories

• 200 calories

• 80 calories

What is the temperature of water when it reaches the boiling point at one atmosphere?

• 100° Centigrade

• 50° Centigrade

• 0° Centigrade

• 150° Centigrade

How many calories are needed to vaporize 1 gram of water at 100° Centigrade?

• 80 calories

• 540 calories

• 100 calories

• 200 calories

What happens to the ice when a wire with weights is placed on it?

• The wire breaks

• The ice completely melts

• The ice remains unchanged

• The ice melts and refreezes above the wire

What is the shape of the curve formed by the wire cutting through the ice?

• Parabola

• Ellipse

• Circle

• Catenary

What effect does pressure have on snow when forming a snowball?

• It melts and refreezes the snow

• It keeps the snow soft

• It evaporates the snow

• It makes the snow colder

Which scientist is associated with the steam engine and observed the kettle's lid moving?

• James Prescott Joule

• James Watt

• Sadi Carnot

• Ludwig Boltzmann

Who measured the temperature difference at the top and bottom of a waterfall to study heat?

• Ludwig Boltzmann

• James Prescott Joule

• Sadi Carnot

• James Clerk Maxwell

Which scientist is known for his work with spinning tops and contributions to thermodynamics?

• James Watt

• Sadi Carnot

• James Prescott Joule

• James Clerk Maxwell