observer1 Posted January 14, 2023 Share Posted January 14, 2023 How much kilo joules per mole is enough to hurt or even be noticed by a human? Is 63.6 Kj/mole a lot? Link to comment Share on other sites More sharing options...
exchemist Posted January 14, 2023 Share Posted January 14, 2023 14 minutes ago, observer1 said: How much kilo joules per mole is enough to hurt or even be noticed by a human? Is 63.6 Kj/mole a lot? Per mole of what? If you mean per mole of water, taking water to be the principal component of the human body, then 4.2J raises the temperature of 1g by 1C deg. The MW of water is 18g, so 4.2 x 18 =75.6J raises the temperature of a mole of water by 1C deg. So 63.6kJ would be enough to raise its temperature by 63.6x 10³/75.6 = 841C, if there were no change of phase. I'll leave the rest to you. Link to comment Share on other sites More sharing options...
observer1 Posted January 14, 2023 Author Share Posted January 14, 2023 what about calcium carbonate? Link to comment Share on other sites More sharing options...
exchemist Posted January 14, 2023 Share Posted January 14, 2023 38 minutes ago, observer1 said: what about calcium carbonate? What are you talking about? Link to comment Share on other sites More sharing options...
observer1 Posted January 15, 2023 Author Share Posted January 15, 2023 If 63.6 Kj of energy is given to one mole of calcium oxide, assuming it's initial temperature is 20 celcius, what will it's new temperature be? Link to comment Share on other sites More sharing options...
exchemist Posted January 15, 2023 Share Posted January 15, 2023 1 hour ago, observer1 said: If 63.6 Kj of energy is given to one mole of calcium oxide, assuming it's initial temperature is 20 celcius, what will it's new temperature be? But you asked about calcium carbonate. And neither has anything to do with hurting humans. Link to comment Share on other sites More sharing options...
NTuft Posted January 15, 2023 Share Posted January 15, 2023 14 minutes ago, exchemist said: But you asked about calcium carbonate. And neither has anything to do with hurting humans. Which one is it? Has to be --------, eh? This reminds me of a quote from iNow: On 1/7/2023 at 6:57 AM, iNow said: I feel with my heart that the internet is becoming inundated with poorly trained bots is that your concern here, exchemist? Or why are you walking on eggshells -- wary because he/she/it mentioned "hurt or even be noticed by a human?" Maybe check post history if concerned? Good show here, thanks. Link to comment Share on other sites More sharing options...
exchemist Posted January 15, 2023 Share Posted January 15, 2023 1 hour ago, NTuft said: Which one is it? Has to be --------, eh? This reminds me of a quote from iNow: is that your concern here, exchemist? Or why are you walking on eggshells -- wary because he/she/it mentioned "hurt or even be noticed by a human?" Maybe check post history if concerned? Good show here, thanks. What? Link to comment Share on other sites More sharing options...
observer1 Posted January 15, 2023 Author Share Posted January 15, 2023 2 hours ago, exchemist said: But you asked about calcium carbonate. And neither has anything to do with hurting humans. screw the hurting part. How much will the temperature rise to for the given conditions? Link to comment Share on other sites More sharing options...
exchemist Posted January 15, 2023 Share Posted January 15, 2023 1 hour ago, observer1 said: screw the hurting part. How much will the temperature rise to for the given conditions? Do you know what specific heat capacity is? https://chempedia.info/info/calcium_carbonate_specific_heat/ Link to comment Share on other sites More sharing options...
observer1 Posted January 15, 2023 Author Share Posted January 15, 2023 aaaaaaaaaaaaaah Link to comment Share on other sites More sharing options...
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