Question

Equal masses of two different liquids have the same temperature of 22.1 °C. Liquid A has a freezing point of -63.0 °C and a specific heat capacity of 1790 J/(kg C°). Liquid B has a freezing point of -82.9 °C and a specific heat capacity of 2580 J/(kg C°). The same amount of heat must be removed from each liquid in order to freeze it into a solid at its respective freezing point. Determine the difference Lf,A - Lf,B between the latent heats of fusion for these liquids.

Answer #1

An unknown material has a normal melting/freezing point of -29.1
°C, and the liquid phase has a specific heat capacity of 178 J/(kg
C°). One-tenth of a kilogram of the solid at -29.1 °C is put into a
0.132-kg aluminum calorimeter cup that contains 0.165 kg of
glycerin. The temperature of the cup and the glycerin is initially
26.9 °C. All the unknown material melts, and the final temperature
at equilibrium is 18.0 °C. The calorimeter neither loses energy to...

8.33 kg of steam at temperature of 150 ∘C has 2.23×107 J of heat
removed from it. Determine the final temperature and phase of the
result once the heat has been removed if the heat is removed at
constant pressure during the gas phase. For this problem, use the
specific heat (at constant pressure) for water as 1850 J/kg∘C , the
latent heat of vaporization as 2.256×106 J/kg , the specific heat
of liquid water as 4186 J/kg∘C , the...

8.33 kg of steam at temperature of 150 ∘C has 2.23×107 J of heat
removed from it. Determine the final temperature and phase of the
result once the heat has been removed if the heat is removed at
constant pressure during the gas phase.
For this problem, use the specific heat (at constant pressure)
for water as 1850 J/kg∘C , the latent heat of vaporization as
2.256×106 J/kg , the specific heat of liquid water as 4186 J/kg∘C ,
the...

⦁ Two identical containers A and B, filled with
equal masses of 2 different liquids, initially at 20°C, are heated
on a hot plate and both receive the same amount of heat. As a
result, the temperature of liquid A is raised to 40°C and that of
liquid B is raised to 80°C. If the liquids are now poured into a
third, larger container and mixed, would their final temperature be
lower, higher, or exactly equal to 60˚C? Explain your...

ethylene glycol is a colorless liquid at room temperature with
the following properties:
melting point is -12.9°C.
boiling point 197.3°C
heat of fusion is 159.50 J/g
heat of vaporization is 1056.87 J/g
heat capacity of the liquid is 2.41 J/g°C
heat capacity of the gas 1.25 J/g°C
If you had a sample of ethylene glycol at -10°C, what state
would it be in (solid, liquid, or gas) if you decreased the
temperature from -10°C to -20°C what phase change would...

At 0°C the latent heat of the ice<-->liquid transition is
3.34 × 105 J/kg. Clean water can be cooled a few degrees
below 0°C without freezing on an ordinary time-scale, even though
ice would have lower G. This non-equilibrium liquid state typically
remains until some disturbance (e.g. a bubble) triggers the
freezing.
1) What is the entropy difference between 4 kg of liquid water
and 4 kg of ice at 0°C?
2) The specific heat of liquid water is cpw=...

A chunk of frozen mercury (the element Hg, not the planet) in an
isolated calorimeter has a little warm water splashed on it to warm
it up. 1.25 kg of mercury begins the problem at a temperature of
-95 C, and is combined with 0.065 kg of water at 15 C. No heat
flows to or from the environment. What is the equilibrium state of
the system, in terms of temperature, mass of water, mass of ice,
mass of solid...

ethylene glycol is a colorless liquid at room temperature with
the following properties
melting point is -12.9°C. boiling
point 197.3°C
heat of fusion is 159.50 J/g, heat of vaporization is 1056.87
J/g
heat capacity of the liquid is 2.41 J/g°C, heat capacity of the
gas 1.25 J/g°C
a) If you had a sample of ethylene glycol at -10°C, what state
would it be in (solid, liquid, or gas)
b) if you decreased the temperature from -10°C to -20°C what
phase...

You have a crate of 40,0 kg of shrimp at 8,0°C. You want to
freeze the shrimp to a temperature of -18,0°C. How much warmth must
be removed from the shrimp to make this happen? The following is
given: The freezingpoint for the shrimp is -2,2°C. The melting
ethalpy for the shrimp is 277 kJ/kg. The spesific heat capacity for
the shrimp before they freeze is 3,62 kJ/kg.°C. The shrimps
specific heat capacity after the freezing point is 1,89
kJ/kg.°C.

A cup of warm water (0.5 kg at 25*C) is poured into a large vat
of liquid nitrogen at 77K. The mixture is thermally insulated from
the surrounding room. The following table of data may be relevant
for this problem (all atmospheric pressure):
Nitrogen
Water
Freezing Point(K)
Boiling Point (K)
63
77
273
373
Specific Heat Capacity (J/kg.K)
1040
4186(water)
2108(ice)
Latent Heat of Fusion(KJ/kg)
Latent Heat of Vaporization (kJ/kg)
25.7
200
333
2260
(A) What will the final temperature...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 18 seconds ago

asked 30 minutes ago

asked 30 minutes ago

asked 31 minutes ago

asked 42 minutes ago

asked 51 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago