Question: How does increasing temperature affect the enthalpy of a substance?
Options:
It decreases enthalpy.
It increases enthalpy.
It has no effect.
It depends on the substance.
Correct Answer: It increases enthalpy.
Solution:
Increasing temperature generally increases the enthalpy of a substance due to increased kinetic energy.
How does increasing temperature affect the enthalpy of a substance?
Practice Questions
Q1
How does increasing temperature affect the enthalpy of a substance?
It decreases enthalpy.
It increases enthalpy.
It has no effect.
It depends on the substance.
Questions & Step-by-Step Solutions
How does increasing temperature affect the enthalpy of a substance?
Step 1: Understand what enthalpy is. Enthalpy is a measure of the total energy of a substance, including its internal energy and the energy required to make space for it.
Step 2: Know that temperature is a measure of how hot or cold something is. It relates to the kinetic energy of the particles in a substance.
Step 3: Realize that when you increase the temperature of a substance, the particles move faster because they gain kinetic energy.
Step 4: Understand that as the particles move faster, they collide with each other more often and with greater energy.
Step 5: Recognize that this increase in particle movement and energy means that the total energy of the substance increases.
Step 6: Conclude that since enthalpy is related to the total energy of a substance, increasing the temperature will generally increase the enthalpy.
Enthalpy and Temperature Relationship – As temperature increases, the kinetic energy of the particles in a substance increases, leading to a rise in enthalpy.
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