AP BIOLOGY

BIOCHEMISTRY

PROPERTIES OF WATER

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The ____ is the amount of heat it takes to raise the temperature of one gram of a substance by one degree Celsius.
A
Heat of vaporization
B
Specific Heat
C
Capillary Action
D
Surface tension
Explanation: 

Detailed explanation-1: -specific heat, the quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree. The units of specific heat are usually calories or joules per gram per Celsius degree. For example, the specific heat of water is 1 calorie (or 4.186 joules) per gram per Celsius degree.

Detailed explanation-2: -Quantifying Specific Heat Quantitative experiments show that 4.18 Joules of heat energy are required to raise the temperature of 1g of water by 1°C.

Detailed explanation-3: -The calorie was originally defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of 1 gram of water 1° Celsius. Since 1925 this calorie has been defined in terms of the joule, the definition since 1948 being that one calorie is equal to approximately 4.2 joules.

Detailed explanation-4: -Specific heat is the amount of heat required to raise one gram of any substance one degree Celsius or Kelvin. The formula for specific heat is the amount of heat absorbed or released = mass x specific heat x change in temperature.

Detailed explanation-5: -The amount of heat per unit mass required to raise the temperature by one degree Celsius is known as latent heat.

There is 1 question to complete.