How much heat is required to raise the temperature of 250 ML of
water from 20-degree Celcius to 35 degrees Celcius? How much heat
is lost by the water as it cools back down to 20 degrees
Celcius?
How much energy, in kiloJoules, would be required to raise the
temperature of 1.00 kilogram of liquid benzene
(C6H6) from 20.0 dC to its boling point of
80.1dC and then to completely vaporize the benzene at this same
temperature? The specific heat capacity of benzene is 1.74J
g-1 0C-1. The molar enthalpy of vaporization
of benzene is 1.929 kJ/mole.
Calculate how much energy is required to heat 20 mL of water
from room temperature to 40 C & also how much energy is
released when 20 mL of water is cooled from the initial temperature
to 10 C
4. In total, how much heat is required to raise the temperature
of a 450 g sample of water (c = 4.18 J/oC.g) in a
saucepan that has a heat capacity of 300 J/oC from
200C to 75oC
a. If I burn 0.315 moles of hexane (C6H14)
in a bomb calorimeter containing 5.65 liters of water, what’s the
molar heat of combustion of hexane is the water temperature rises
by 55.40 oC? The heat capacity of water is 4.18 J/g...
Ethanol, , boils at 78.29 °C. How much energy, in joules, is
required to raise the temperature of 3.00 kg of ethanol from 38.0
°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 its enthalpy of vaporization is 855 J/g.)
a-How much heat is required to convert 5.0 kg of ice from a
temperature of -10 C to water vapor at a temperature of 220F? b-You
have 200 g of coffee at 55 C, Coffee has the same specific heat as
water. How much ice at -5 C do you need to add in order to reduce
the coffee’s temperature to 27C.
How much energy in kJ is required to fully vaporize (at
temperature of boiling point = 2525C) a 270g sample of Al(s),
initially at 25C?
(Enthalpy of vap = 300. kJ/mol, enthalpy of fusion = 11.
kJ/mol)
(specific heat of aluminum for both solid and liquid form = 0.9
J/(K * g))
(temperature of melting point = 625C, temp of boiling point =
2525C)
Part B
The amount of boiling water required to raise the temperature of
25.0 kgof water in the bath to body temperature is 4.80 kg.
In this process, the heat lost by the boiling water is equal to
the heat gained by the room-temperature water. How much heat was
transferred in this process?
Express your answer to four significant figures and
include the appropriate units.
n this problem answers are requested to three significant
digits for grading purposes. The true...