Chapter 2 – The Structure of the Atom
List of PEKA experiments:
- Diffusion of particles in a gas, liquid and solid
Number | Activity 2.1 |
Pg. | 7 |
Title | Diffusion of particles in a gas, liquid and solid |
Aim | To investigate the diffusion of particles in a gas, liquid and solid |
Problem Statement | How diffusion does occur through solid, a liquid and gas? |
Hypothesis | Particles can diffuse through the spaces between the particles of a solid, a liquid and the gas. |
Apparatus | A. Diffusion in a gas
B. Diffusion in a liquid
C. Diffusion in a solid
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Material | A. Diffusion in a gas
B. Diffusion in a liquid
C. Diffusion in a solid
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Variables |
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2. Rate of diffusion depends on the temperature
Number | Activity 2.2 |
Pg. | 8 |
Title | Rate of diffusion depends on the temperature |
Aim | To show that the rate of diffusion depends on the temperature |
Problem Statement | How does rate of diffusion depends on the temperature? |
Hypothesis | Higher temperature can increase the rate of diffusion |
Apparatus |
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Material |
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Variables |
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Operational Definition | Higher temperature in water increases the particles to move faster and increases the rate of diffusion. / Higher temperature in water increases the kinetics energy than lower temperature in water. |
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3. Rate of diffusion depends on the mass of the gas particles
Number | Activity 2.3 |
Pg. | 9 |
Title | Rate of diffusion depends on the mass of the gas particles |
Aim | To show that the rate of diffusion depends on the mass of the gas particles |
Problem Statement | How does rate of diffusion depends on the mass of the gas particles? |
Hypothesis | Low molecular masses diffuse faster than those with high molecular masses |
Apparatus |
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Material |
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Variables |
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Operational Definition | Gas with low molecular masses diffuse faster than those with high molecular masses. |
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4. Melting and freezing points of naphthalene, C10H8
Number | Activity 2.4 |
Pg. | 9 |
Title | Melting and freezing points of naphthalene, C10H8 |
Aim | To determine the melting and freezing points of naphthalene, C10H8 |
Problem Statement | How does rate of diffusion depends on the mass of the gas particles? |
Hypothesis | The temperature of naphthalene, C10H8 increase during heating except at its melting and solidification points |
Apparatus |
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Material |
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Variables |
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