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In the activity where water is slowly added to calcium oxide in a beaker, what change in temperature is observed?

Question
In the activity where water is slowly added to calcium oxide in a beaker, what change in temperature is observed?
The beaker becomes noticeably hot
The beaker becomes noticeably cold
No change in temperature occurs
The beaker first cools, then heats
Answer
The beaker becomes noticeably hot
Detailed Explanation
Calcium oxide reacts vigorously with water and releases a large amount of heat, making the beaker feel hot to the touch.
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