Climate Quiz 2 Flashcards
whats the specific heat capacity of a substance
the amount of energy required to raise the temperature of 1g of the substance by 1°C
whats quantity of thermal energy
amount of thermal energy absorbed or released when the temperature of specific mass of a substance changes by a certain number of degrees
what variable represents quantity of thermal energy
Q
does the temperature of the substance change when bonds break or form during a phase change
no
what happens during a phase change
energy is released or absorbed by the bonds between particles
what happens when water goes from liquid to solid
thermal energy is released
what happens when liquid water changes to water vapour
thermal energy is absorbed
whats the heat of fusion of a substance
amount of energy absorbed when 1 mol of the substance changes from the solid to liquid phase without a change in temperature
whats it call when energy is released during the reverse phase change when 1 mol of a solid forms
heat of solidification
whats the heat of vaporization
amount of energy absorbed when 1 mol of the substance changes from liquid to vapour phase without a change in temperature
what’s it called when energy is released during the reverse phase changed when 1 mol of vapour condenses to a liquid
heat of condensation
what formula can be used to calculate the amount of energy absorbed or released during a phase change
h = q/n where h is the heat, q is the quantity of thermal energy and n is the amount of the substance in mols
what formula can be used to convert molar mass to mols, and what does each component mean
n=m/M where n is the number of moles, m is the mass and M is the molar mass
whats the formula used to calculate the quantity of thermal energy
q = mc𝚫T where q is the quantity of thermal energy, m is the mass of the substance, c is the specific heat capacity of the substance and 𝚫T is the change the temperature of the substance
