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Which of the following processes is associated with a positive enthalpy change?
Which of the following processes is associated with a positive enthalpy change?
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Practice Questions
1 question
Q1
Which of the following processes is associated with a positive enthalpy change?
Combustion.
Dissolution of salts in water.
Melting of ice.
Condensation of steam.
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The melting of ice is an endothermic process, which absorbs heat and results in a positive enthalpy change (ΔH > 0).
Questions & Step-by-step Solutions
1 item
Q
Q: Which of the following processes is associated with a positive enthalpy change?
Solution:
The melting of ice is an endothermic process, which absorbs heat and results in a positive enthalpy change (ΔH > 0).
Steps: 5
Show Steps
Step 1: Understand what enthalpy change means. Enthalpy change (ΔH) indicates whether a process absorbs or releases heat.
Step 2: Identify the types of processes. An endothermic process absorbs heat, while an exothermic process releases heat.
Step 3: Recognize that a positive enthalpy change (ΔH > 0) means heat is absorbed.
Step 4: Consider the melting of ice. When ice melts, it absorbs heat from the surroundings.
Step 5: Conclude that since melting ice absorbs heat, it is an endothermic process and has a positive enthalpy change.
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