Question

If all the energy obtained from burning 0.80 pounds of
propane is used to heat water, how many kilograms of water can be
heated from 20.0°C to 43.9°C?

_______kg

Answer #1

The amount of energy released by burning a fuel source, measured
in energy per mass, is called the fuel value. If all the energy
obtained from burning 1.20 pounds of propane (fuel value is 11.09
kcal/g) is used to heat 129.0 kg of water at an initial temperature
of 19.8 °C, what is the final temperature?

Propane (C3H8) is a component of natural
gas and is used in domestic cooking and heating. It burns according
to the following reaction:
C3H8 + O2 → CO2
+ H2O
Balance the equation representing the combustion of propane in
air.
How many grams of carbon dioxide can be produced by burning 20.0
pounds of propane, the typical size of a BBG grill propane tank?
Assume that oxygen is the excess reagent in this reaction.

If 1 mole of propane (C3H8) generates
-2220 kJ of heat on combustion, how much propane (at STP) is used
to heat 4 L of water from 20 °C to 100 °C? Use an average heat
capacity of 4.2 J/kg and assume a density of water as 1.00 g/mL,
and assume ideal gas behaviour.
13.6 mL
14.9 mL
13.6 L
0.605 mL

A)
Calculate how much energy is required to heat 20.0 mL of water from
room temperature to 40.0 celcius and
B)how much energy is released when 20.0mL of water is cooled from
the initial temperature to 10.0 celcius.

Is there enough energy in a Bic lighter (5 g of butane) to heat
the water in a 500 ml water bottle to boiling, and to boil all the
water? If not, how many lighters are required to heat and boil all
the water?Assume the water is initially at 25 C, and the density of
water is 1g/ml.

Industrially, hydrogen gas can be prepared by combining propane gas
(C3H8) with steam at about 400°C. The
products are carbon monoxide gas (CO) and hydrogen gas
(H2).
(a) Write a balanced equation for the reaction.
(b) How many kilograms of H2 can be obtained from 3.95
×103 kg of propane?
____×10____kg H2 gas

How much energy is needed to heat 5.00 pounds (2270 grams) of
snow at –15.5°C to water at body temperature, 37.0°C?

(a) How much energy does it take to heat 250 g of water from 20
◦C to the boiling point of 100 ◦C? (The specific heat of water is
4190 J/kg · K)
(b) (Suppose you wanted to cause the temperature change in part
(a) by using an 800W microwave. If we assume all the power
delivered by the microwave goes into the water, how long will it
take for the water to change temperature?
(c) The heat of vaporization...

Assuming that all the energy of the water is converted to heat,
calculate the temperature rise of the water in degrees Celsius
after falling over California'a Yosemite Falls, a distance of 739
m. Potential energy of the water at the top of the falls is equal
to mass of the water times the acceleration due to gravity times
the height. 1 kg m2/s2 is equal to _____ Joule. Assume 1.00 kg of
water falling over Yosemite. The change in potential...

How much energy (J) is contained in 1.1 kg of water if its
natural deuterium is used in the fusion reaction of 21H+21H?31H+
11H?
Compare to the energy obtained from the burning of 1.1 kg of
gasoline, about 5.5×107 J .

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