Suppose an experiment is performed in which a plant is supplied
with normal carbon dioxide but...
Suppose an experiment is performed in which a plant is supplied
with normal carbon dioxide but with water containing radioactive
oxygen atoms (O18). At the end of photosynthesis where
would the O18 atoms be/end up/go? Explain.
A plant makes liquid carbon dioxide by treating a limestone with
commercial sulfuric acid. The limestone analyzes 68.1% calcium
carbonate, 27.1% magnesium carbonate and the rest silica. The acid
used was 88.3% sulfuric acid with rest being water. Calculate the
pounds of acid required per ton of limestone treated.
When a plant grows, the atoms used come from carbon dioxide in
the air and water. Plants are able to accomplish this through the
process of photosynthesis, cellular respiration and biosynthesis of
macromolecules.
Where does the energy come from that allow plants to synthesize
the necessary biological macromolecules that allow it to grow?
Hint: It is NOT from sunlight. Explain your
answer.
1. Suppose that Climate Change is caused the emissions of carbon
dioxide and methane gases. Suppose further that the United Nations
proposes a policy to combat these emissions to reduce the impact of
Climate Change. This policy proposes that each country in the world
reduces their carbon dioxide and methane emissions by 50% over the
next two years (i.e., each country should cut their emissions by
half). The United Nations suggests that countries could tax
polluters to get them to...
Plants require carbon dioxide for photosynthesis; despite this,
the greater the amount of carbon dioxide released into the
atmosphere by various sources (including carbon emissions from
vehicles), the worse it is for our biosphere. Discuss 3 reasons why
it is detrimental to our planet to have high levels of carbon
dioxide emitted continuously into the atmosphere.
Dry ice is solid carbon dioxide. Instead of melting, solid
carbon dioxide sublimes according to the following equation:
CO2(s)→CO2(g). When dry ice is added to warm water, heat from the
water causes the dry ice to sublime more quickly. The evaporating
carbon dioxide produces a dense fog often used to create special
effects. In a simple dry ice fog machine, dry ice is added to warm
water in a Styrofoam cooler. The dry ice produces fog until it
evaporates away,...
Carbon Dioxide is being generated in an occupied space. Each
person breathe out carbon
dioxide at the rate 0.0107 cfm. Outdoor air with CO2
concentration of 280 ppm is being
supplied to the space at the rate of 6000cfm. It is desired to
keep the concentration level of
CO2 in the space below 1000 ppm. Assuming the room is complete
mixing condition,
determine how many person could occupy the room and not exceed
the desired CO2 level.
(1 ppm =...
12.2 Compression of Carbon Dioxide
Carbon dioxide (CO2) at 1 bar and 300 K enters a compressor
operating at steady state and is compressed adiabatically to an
exit state of 10 bar and 520 K. The CO2 is modelled as an ideal
gas, and the KE and PE effects are negligible. For the compressor,
determine
a) Work input [kJ/kg]
b) Rate of entropy production [kJ/kg?K]
c) The isentropic compressor efficiency
d) T-s diagram of isentropic and real process
Dry ice is solid carbon dioxide. Instead of melting, solid
carbon dioxide sublimes according to the following equation:
CO2(s)→CO2(g). When dry ice is added to warm
water, heat from the water causes the dry ice to sublime more
quickly. The evaporating carbon dioxide produces a dense fog often
used to create special effects. In a simple dry ice fog machine,
dry ice is added to warm water in a Styrofoam cooler. The dry ice
produces fog until it evaporates away,...
The structures of carbon dioxide and silicon dioxide are shown in the diagram below.
Use your knowledge of structure and bonding to explain the following:
a. Carbon dioxide is a gas at room temperature.
b. Silicon(IV) oxide is a solid with a high melting point.
c. Neither carbon dioxide nor silicon(IV) oxide conducts electricity.