MTSA PHYSICS; THERMODYNAMICS TEST LATEST
UPDATED
Average body temperature: 37 C or 98.6 F
At sea level, the freezing/melting point of water is 0ºC (273 K).
32°F
ANSWER Sublimation is the direct transformation of a solid into a gas.
For example, heated iodine crystals and dry ice
ANSWER Deposition is the direct transformation of a gas into a solid.
For example, snow generation and iodine gas cooling
Latent heat: A response Heat is either released or added when a substance
undergoes a state shift. We refer to this as latent heat.
What was added to the process when water turned from ice to vapor? The
sublimation's latent heat
What is lost in the process if vapor turns into ice? ANSWER The environment
is exposed to the latent heat of deposition.
Is 0°C water always ice? ANSWER: No! It can be either liquid or ice. The state
it will be in is determined by the amount of internal energy.
The heat at which water fuses - ANSWER The heat needed to convert 1g of ice
at 0°C to 1g of H2O at 0°C is 80 cal.
The heat at which water vaporizes - ANSWER One gram of liquid water at 100
degrees Celsius requires 540 cal of heat to convert to water vapor.
For every degree change between 0°C and 100°C, ANSWER 1 cal
Consequently, 0-100 = 100cal
UPDATED
Average body temperature: 37 C or 98.6 F
At sea level, the freezing/melting point of water is 0ºC (273 K).
32°F
ANSWER Sublimation is the direct transformation of a solid into a gas.
For example, heated iodine crystals and dry ice
ANSWER Deposition is the direct transformation of a gas into a solid.
For example, snow generation and iodine gas cooling
Latent heat: A response Heat is either released or added when a substance
undergoes a state shift. We refer to this as latent heat.
What was added to the process when water turned from ice to vapor? The
sublimation's latent heat
What is lost in the process if vapor turns into ice? ANSWER The environment
is exposed to the latent heat of deposition.
Is 0°C water always ice? ANSWER: No! It can be either liquid or ice. The state
it will be in is determined by the amount of internal energy.
The heat at which water fuses - ANSWER The heat needed to convert 1g of ice
at 0°C to 1g of H2O at 0°C is 80 cal.
The heat at which water vaporizes - ANSWER One gram of liquid water at 100
degrees Celsius requires 540 cal of heat to convert to water vapor.
For every degree change between 0°C and 100°C, ANSWER 1 cal
Consequently, 0-100 = 100cal
