A 0.250-g chunk of sodium metal is cautiously dropped into a mixture of 50.0 g water and 50.0 g ice, both at 0°C. The reaction is 2 Na ( s ) + 2 H 2 O ( l ) → 2 NaOH ( a q ) + H 2 ( g ) Δ H = − 368 kJ Assuming no heat loss to the surroundings, will the ice melt? Assuming the final mixture has a specific heat capacity of 4.18 J/g∙°c, calculate the final temperature. The enthalpy of fusion for ice is 6.02 kJ/mol.
A 0.250-g chunk of sodium metal is cautiously dropped into a mixture of 50.0 g water and 50.0 g ice, both at 0°C. The reaction is 2 Na ( s ) + 2 H 2 O ( l ) → 2 NaOH ( a q ) + H 2 ( g ) Δ H = − 368 kJ Assuming no heat loss to the surroundings, will the ice melt? Assuming the final mixture has a specific heat capacity of 4.18 J/g∙°c, calculate the final temperature. The enthalpy of fusion for ice is 6.02 kJ/mol.
Solution Summary: The author explains that the final temperature of an ice has to be calculated.
A 0.250-g chunk of sodium metal is cautiously dropped into a mixture of 50.0 g water and 50.0 g ice, both at 0°C. The reaction is
2
Na
(
s
)
+
2
H
2
O
(
l
)
→
2
NaOH
(
a
q
)
+
H
2
(
g
)
Δ
H
=
−
368
kJ
Assuming no heat loss to the surroundings, will the ice melt? Assuming the final mixture has a specific heat capacity of 4.18 J/g∙°c, calculate the final temperature. The enthalpy of fusion for ice is 6.02 kJ/mol.
A 26.2-mL sample of benzene at 26.1°C was cooled to its melting point, 5.5 °C, and then frozen at 5.5 °C. Calculate the quantity of energy transferred to the surroundings in this process.
The density of benzene is 0.876 g/mL. The specific heat capacity of the liquid is 1.74 J g-1 K-1. Its fusion enthalpy is 127 J/g.
If 31.5 g of LiBr are dissolved 350.0 g of water at 20.0 °C in an insulated container, a temperature change is observed. The ∆H of solution of LiBr is -48.8 kJ/mol. Assuming that the specific heat of the solution is 4.184 J/(g°C), and that no heat is gained or lost by the container, what will be the final temperature of the solution?
you chop out a 500 g sample of ice out of the Red River when it –40°C outside, then you bring the ice sample indoors where it melts and heats up to 25°C. Assuming that Red River ice is composed of pure water, what is the total energy is absorbed by the ice sample? Water Data Density of water 1.00 g/mL Heat capacity of ice: 2.09 J g–1 K–1 Heat capacity of liquid water: 4.18 J g–1 K–1 Heat capacity of water vapour: 2.01 J g–1 K–1 Enthalpy of fusion: 6.02 kJ mol–1 Enthalpy of vapourization: 40.7 kJ mol–1 Melting point (1 bar): 273 K Boiling point (1 bar): 373 K
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Calorimetry Concept, Examples and Thermochemistry | How to Pass Chemistry; Author: Melissa Maribel;https://www.youtube.com/watch?v=nSh29lUGj00;License: Standard YouTube License, CC-BY