December 14, 2019, 04:59:02 AM
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Topic: Photosynthesis and artificial photosynthesis  (Read 218 times)

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Offline bennyh

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Photosynthesis and artificial photosynthesis
« on: December 01, 2019, 10:50:06 AM »
Hi guys,
i'm not understand something simple in photosynthesis . according literature the process is endothermic with a huge amount of energy taken by surrounding ~2000Kj/mole.

1. i know that leaves doesn't freezing under those endothermic reaction and moreover they not getting cold but Photosynthesis  is endothermic reaction so why the temperature of leaves is not decreasing?

2. if natural Photosynthesis enthalpy is  around 2000kJ/mole  how much should be enthalpy of formation of artificial Photosynthesis ?

thanks for helpers :)

Offline Yggdrasil

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Re: Photosynthesis and artificial photosynthesis
« Reply #1 on: December 01, 2019, 02:37:50 PM »
Most of the energy that fuels photosynthesis comes not from heat but from the absorption of solar energy by chlorophyll.

Offline bennyh

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Re: Photosynthesis and artificial photosynthesis
« Reply #2 on: December 02, 2019, 02:32:25 AM »
Most of the energy that fuels photosynthesis comes not from heat but from the absorption of solar energy by chlorophyll.
so the term endothermic ( with +2,000 kj/mole) mean only UV absorption ?
non thermal heat is required? (if so the term is misleading)

Offline Borek

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Re: Photosynthesis and artificial photosynthesis
« Reply #3 on: December 02, 2019, 04:05:52 AM »
non thermal heat is required? (if so the term is misleading)

No such thing as "non thermal heat" - if anything, you mean "non thermal energy".

In a way you are right, if treated literally, the term is misleading. But nobody treats it literally, it is always understood as "absorbing energy". The term was coined quite long ago and and retained its initial historical form.
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Offline bennyh

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Re: Photosynthesis and artificial photosynthesis
« Reply #4 on: December 03, 2019, 03:20:52 AM »
non thermal heat is required? (if so the term is misleading)

No such thing as "non thermal heat" - if anything, you mean "non thermal energy".

In a way you are right, if treated literally, the term is misleading. But nobody treats it literally, it is always understood as "absorbing energy". The term was coined quite long ago and and retained its initial historical form.

Thanks a lot :)

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