Homework Help is Here – Start Your Trial Now!
Engineering
Mechanical Engineering
tep by step solution answer is given below. Question: According to (9.3), photosynthesis stores 460 kJ per mole C. Use  this to calculate how much energy is stored per year by the global  terrestrial net primary production. How much is this in Watts (J/s)?    Answer: 50 GtC/y -> 1.9 × 1021 J/y = 6.1 × 1013 W

tep by step solution answer is given below. Question: According to (9.3), photosynthesis stores 460 kJ per mole C. Use  this to calculate how much energy is stored per year by the global  terrestrial net primary production. How much is this in Watts (J/s)?    Answer: 50 GtC/y -> 1.9 × 1021 J/y = 6.1 × 1013 W

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
See similar textbooks
icon
Related questions
Question

Step by step solution answer is given below.

Question: According to (9.3), photosynthesis stores 460 kJ per mole C. Use 
this to calculate how much energy is stored per year by the global 
terrestrial net primary production. How much is this in Watts (J/s)? 

 

Answer: 50 GtC/y -> 1.9 × 1021 J/y = 6.1 × 1013 W

The energy absorbed in the formation of biomass from solar radiation during photosynthesis equals that emitted as heat in combustion, since: AH + CO₂ + 2H₂O photosynthesis combustion [CH,O] + O, + H,O (9.3) AH = 460 KJ per mole C = 4.8 eV per atom C = 16 MJ kg-¹ of dry carbohydrate material Here AH is the enthalpy change of the combustion process, equal to the energy absorbed from the photons of solar radiation in photosynthesis, less the energy of respiration during growth and losses during precursor reactions (see §9.4). AH may be considered as the heat of combustion; its exact value depends on whether or not water formed is liquid or vapor. Note that combustion requires temperatures of ~400°C, whereas respiration proceeds by catalytic enzyme reactions at -20°C. The uptake of CO₂ by a plant leaf is a function of many factors, especially tempera- ture, CO₂ concentration and the intensity and wavelength distributions of light.
Transcribed Image Text:The energy absorbed in the formation of biomass from solar radiation during photosynthesis equals that emitted as heat in combustion, since: AH + CO₂ + 2H₂O photosynthesis combustion [CH,O] + O, + H,O (9.3) AH = 460 KJ per mole C = 4.8 eV per atom C = 16 MJ kg-¹ of dry carbohydrate material Here AH is the enthalpy change of the combustion process, equal to the energy absorbed from the photons of solar radiation in photosynthesis, less the energy of respiration during growth and losses during precursor reactions (see §9.4). AH may be considered as the heat of combustion; its exact value depends on whether or not water formed is liquid or vapor. Note that combustion requires temperatures of ~400°C, whereas respiration proceeds by catalytic enzyme reactions at -20°C. The uptake of CO₂ by a plant leaf is a function of many factors, especially tempera- ture, CO₂ concentration and the intensity and wavelength distributions of light.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Available Energy
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY
SEE MORE TEXTBOOKS