Interconversion of States of Matter
Chemistry ⇒ States of Matter
Interconversion of States of Matter starts at 6 and continues till grade 12.
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A sample of ice at 0°C is heated at 1 atm pressure. Describe the sequence of phase changes that will occur as the temperature increases to 120°C.
A substance has a melting point of -10°C and a boiling point of 50°C at 1 atm. What is its physical state at 25°C and 1 atm?
At what temperature and pressure do all three states of matter coexist in equilibrium?
Describe the changes in kinetic energy of particles during condensation.
A sample of ice at 0°C is heated at 1 atm pressure. Describe the sequence of phase changes that will occur as the temperature increases to 120°C.
A substance has a melting point of -10°C and a boiling point of 50°C at 1 atm. What is its physical state at 25°C and 1 atm?
Calculate the amount of heat required to convert 10 g of ice at 0°C to water at 0°C. (Given: ΔHfus for water = 334 J/g)
Calculate the energy required to vaporize 20 g of water at 100°C. (ΔHvap for water = 2260 J/g)
Which of the following is an endothermic process?
(1) Freezing
(2) Condensation
(3) Melting
(4) Deposition
Which of the following is an example of deposition?
(1) Frost formation
(2) Ice melting
(3) Water boiling
(4) Iodine subliming
Which of the following is NOT a characteristic of boiling?
(1) Occurs at a fixed temperature
(2) Occurs throughout the liquid
(3) Occurs only at the surface
(4) Requires heat energy
Which of the following is NOT a factor affecting the rate of evaporation?
(1) Surface area
(2) Temperature
(3) Humidity
(4) Color of the liquid
The enthalpy change when 1 mole of a liquid is converted to vapor at its boiling point is called __________.
The heat energy required to change 1 mole of a solid into liquid at its melting point is called __________.
The process of changing a gas directly into a solid is called __________.
The process of changing a gas into a liquid is called __________.
True or False: Boiling and evaporation are both processes that convert a liquid into a gas, but boiling occurs at a specific temperature while evaporation can occur at any temperature.
True or False: Freezing is an endothermic process.
True or False: Sublimation is an endothermic process.
True or False: The boiling point of a liquid decreases at higher altitudes.
