Multiple Choice
The amount of heat required to convert 1 g of any substance from the liquid to the gaseous state is defined as __________.
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3. Water
Properties of Water- Thermal
Multiple Choice
If water were not a polar molecule, how would the effects of climatic warming differ from those currently observed or predicted to occur in the future?
A
If water molecules were nonpolar, then water vapor would be less effective as a greenhouse gas, and the effects of global warming would be less extreme.
B
The effects would be worse because a loss of the polar molecular structure would lead to a greater amount of heat absorbed by water molecules and, thus, an increase in its specific heat.
C
If water were nonpolar, the effects on global warming would be only slightly worse because there are other polar molecules that can moderate climate as water does.
D
The effects would be drastically worse because the loss of the polar nature of water would greatly reduce its specific heat and its ability to moderate temperature.
Verified step by step guidance1
Understand the concept of polarity: Water is a polar molecule, meaning it has a partial positive charge on one side and a partial negative charge on the other, which allows it to form hydrogen bonds.
Recognize the role of water's polarity in climate regulation: Water's high specific heat capacity, due to its polarity, allows it to absorb and release large amounts of heat with little temperature change, moderating Earth's climate.
Consider the impact of nonpolarity: If water were nonpolar, it would not form hydrogen bonds, leading to a lower specific heat capacity. This means water would heat up and cool down more quickly, reducing its ability to moderate temperature.
Analyze the consequences on global warming: With a lower specific heat, water would absorb heat more rapidly, leading to more extreme temperature fluctuations and exacerbating the effects of global warming.
Conclude the overall impact: The loss of water's polar nature would drastically worsen the effects of global warming, as water would no longer effectively moderate temperature changes, leading to more severe climate conditions.
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