Name: The molar heat capacity of mercury is Jim01-K Whar is the specitisc heat c

Question

Name: The molar heat capacity of mercury is Jim01-K Whar is the specitisc heat capacity of this metal in Vs- K? (74) A 182-g sample of gold at some temperature was added to 22.1 g of water. The initial waier temperature was 25.0 "C, and the final eemperature was 27.5 "C. If the specic heat capacity of gold is 0.128 %, what was the initial temperature of the gold sample? Ethanol C,H OH, boils at 78.29 "C. How much encrgy, in joules, is required to raise the temperatare of 1.00 kg of ethanol from 20.0 "C to the boiling point and then to change the liquid to vapor at that temperature? (The specific heat capacity of liquid ethanol is 2.44 J/g K and issernchalpy of vaporization is 8SS)) Adding 5.44 g of NHAOds) to 150.0 g of water in a- coffee-cup calorimeter (with stirring to dissolve the salt) resulted in decrease in temperature from 18.6 "C to 16.1 Calculate the enthalpy change for dissolving NH,NOs) in water, in kJimol. Assume the solution whose mass is 135.4 gi has a specific beat capacity of

Explanation / Answer

1. To calculate the specific heat capacity of mercury we have to divide the molar heat capacity to the molar mass of mercury.

Specific heat capacity= 28.1/200.59= 0.140 J/g-C

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