Monday
December 22, 2014

Posts by Cha-Ching


Total # Posts: 6

Beginner Chemistry!
How much heat is lost by 65g of silver when it cools from 325ºC to -25ºC? (the specific heat of Ag(s) is 0.24 J/g ºC)
December 19, 2011

Beginner Chemistry
How much heat energy is needed to convert 125.0g of ice from -27.0ºC to a liquid at 50.0ºC?
December 19, 2011

CHEMISTRY
How much heat is lost by 65g of silver when it cools from 325ºC to -25ºC? (the specific heat of Ag(s) is 0.24 J/g ºC)
December 16, 2011

CHEMISTRY
How much heat energy is needed to convert 125.0g of ice from -27.0ºC to a liquid at 50.0ºC?
December 16, 2011

CHEMISTRY
1.Calculate the enthalpy change (ΔHºrxn) for the following reaction: (The enthalpy of formation of aqueous sodium hydroxide is -469.60 kJ/mol. The enthalpy of formation of liquid water is -285.8 kJ/mol.) 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g) 2.Do you know if...
December 16, 2011

CHEMISTRY
A 47.5g sample of metal is heated to 300.0ºC and placed in a calorimeter containing 75.0g water at 22.0ºC. The final temperature of the system is 40.0ºC. What is the specific heat of the metal? (the specific heat of water is 4.18 J/g ºC) Thanks for your ...
December 16, 2011

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