specific latent heat

What is specific latent heat defined as?

• The amount of heat required to change one kilogram of a substance from one physical state to another without any change in temperature.
• The heat energy required to raise the temperature of one kilogram of substance by one degree Celsius.
• The energy required to vaporize a gas into a plasma.
• The increase in temperature when a substance is heated.

During a change of state, how does the temperature behave?

• The temperature remains constant during the change of state.
• The temperature fluctuates unpredictably.
• The temperature decreases steadily.
• The temperature increases steadily.

What occurs to the bonds between molecules during melting?

• The bonds between the molecules are broken.
• The bonds do not change.
• The bonds are completely destroyed.
• The bonds are formed stronger.

How does the specific latent heat of melting compare to that of vaporization?

• It takes more energy to vaporize than to melt the same substance.
• It varies randomly depending on the substance.
• It takes the same amount of energy for both processes.
• It takes less energy to vaporize than to melt.

What is the formula for calculating specific latent heat?

• Specific Latent Heat = Energy / Mass
• Specific Latent Heat = Mass / Energy
• Specific Latent Heat = Energy x Mass
• Specific Latent Heat = Temperature / Energy

What happens to the temperature of a substance once the state change is complete?

• The temperature begins to rise after the state change is complete.
• The temperature fluctuates widely.
• The temperature drops immediately.
• The temperature remains constant indefinitely.

What does specific latent heat measure?

• The heat energy absorbed or released during a state change.
• The heat energy required to raise the temperature.
• The total heat capacity of a substance.
• The energy released during combustion.

Which of the following is true about specific latent heat?

• It can differ for different state changes of the same substance.
• It is always the same regardless of the state change.
• It cannot be measured accurately.
• It is only relevant for solids.

How does heat energy relate to the temperature of a plastic fork when it reaches its melting point?

• The heat is used to break bonds, so temperature does not rise until melting is complete.
• The heat energy is not absorbed at all.
• The fork cools down during melting.
• The temperature rises immediately as it melts.

What is a common example of specific latent heat in action?

• The heat absorbed when a candle burns and solid wax melts.
• The heat released when water freezes.
• The heat absorbed when ice is placed in a drink.
• The heat produced when cooking food.