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Substances can exist in three states of matter - solid, liquid and gas. Substances can change states. To change the state of a substance energy must be transferred to, or from, the substance.
How many calories are required to increase the temperature of 13 g of alcohol from 11 °C to 23 °C? The specific heat of alcohol is 0.59 cal/g °C. Answers: 83 cal 0.54 cal 170 cal 0.63 cal 92 cal
(A calorie is defined as the amount of energy needed to raise one gram of water 1°C.) - The change from liquid to ice is called solidification. This process will release 80 calories per gram. - The change from liquid to vapor is called evaporation. This process requires 600 calories. - The opposite of evaporation is called condensation.
12 kwi 2023 · We take advantage of changes between the gas, liquid, and solid states to cool a drink with ice cubes (solid to liquid), cool our bodies by perspiration (liquid to gas), and cool food inside a refrigerator (gas to liquid and vice versa).
20 sie 2020 · Everyday we take advantage of changes between the gas, liquid, and solid states to cool a drink with ice cubes (solid to liquid), cool our bodies by perspiration (liquid to gas), and cool food inside a refrigerator (gas to liquid and vice versa).
The enthalpy of vaporization of liquid isopropyl alcohol is 45 kJ/mol. Calculate the energy required to vaporize 39.5 g of this compound., How much energy is needed to vaporize 25.0 g of H2O at 100 °C, given that ΔHvap of water = 40.7 kJ/mol?, The normal boiling point of benzene is 80.1 °C.
When at "normal" temperatures (between \(0^\text{o} \text{C}\) and \(100^\text{o} \text{C}\)), it is a liquid. While at temperatures above \(100^\text{o} \text{C}\), water is a gas (steam). The state the water is in depends upon the temperature. Each state (solid, liquid, and gas) has its own unique set of physical properties.
