Heating Curve

Question 1

The heating curve of a substance

Answer 1

Shows the changes in temperature of a substance during a time period when heating occurs

Question 2

Another name for heating curve of water

Answer 2

Temperature of water vs time(s)

Question 3

Temperature

Answer 3

How fast are the particles moving and the measure of the objects internal energy. If the particles are moving faster then the temperature increases and if the particles move slower then the temperature decreases. If the particles maintain a constant speed then temperature remains constant

Question 4

A to b(solid ice - 20°)

Answer 4

In the solid phase, the particles are vibrating so they are moving. Our source of heat adds energy into the solid causing the particles or molecules to vibrate more, moving faster therefore temperature increases.

Energy entering the system is used to increase kinetic energy of molecules

Question 5

B to C(0°)

Answer 5

The ice changes into a liquid water or liquid water changes into ice-pure substance

When they change phases, energy coming in is used to not increase kinetic energy of molecules but rather overcome the intermolecular forces holding them together therefore they maintain a constant speed making the temperature constant. The particles spread apart as they break the forces. Thus is now melting.

Question 6

C

Answer 6

Is now in liquid phase

Question 7

C to d

Answer 7

Particles use the energy entering the system to move faster and faster so their kinetic energy increases therefore temperature increases

Question 8

D to E-100°

Answer 8

Energy coming into the system is used to break the intermolecular forces, because energy is not used to increase kinetic energy of the molecules, temperature remains constant the particles/substance is now in the gas phase - boiling point

Question 9

E

Answer 9

Substance is a gas. So now temperature increases as energy entering is now used to increase kinetic energy

Question 10

Particle arrangement in different states of Matter

Answer 10

Here’s a concise summary:

Solid

• Particles are closely packed
• Fixed positions in a regular, three-dimensional arrangement
• Vibrate slightly in place

Liquid

• Particles are close together but not fixed
• Free to move past each other, with some random motion
• Have some short-range order, but no long-range order

Gas

• Particles are widely spaced and free to move
• Random, chaotic motion with no fixed positions
• No short-range or long-range order