To elevate the boiling point of water to 110°C, what external pressure is required?
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Answer: A. Between 760 torr and 1200 torr
Explanation
Higher boiling points require increased external vapor pressure on liquids. Elevating water boiling to 110 degrees Celsius demands higher pressure environments. Pressure cooker devices use this principle to cook food faster. Vapor pressure curves show exponential relationships between temperature and pressure. Standard pressure of 760 torr boils water at 100 degrees Celsius. Increasing temperature shifts the liquid-gas equilibrium requiring higher pressure containment.
Pressure cookers raise internal steam pressure to accelerate food preparation times. Steam power plants operate boilers under high pressure for efficiency. Autoclaves sterilize medical equipment using pressurized steam above normal temperatures. Option B is wrong because lower pressure decreases the boiling temperature. Option C is incorrect because 765 torr only raises the boiling point slightly. Option D is incorrect because pressure must be precisely controlled to reach 110°C.
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