I got a positive number for an exothermic reaction? Watch

BirdV3
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I'm calculating the heat of formation of one mole of magnesium ion, and got a value of 133.42 kJ mol^-1


because this is exothermic, it needs to be negative, so can i just put the negative? or have i gone wrong in my calculations?

thanks for any help in advance!
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GDN
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(Original post by BirdV3)
I'm calculating the heat of formation of one mole of magnesium ion, and got a value of 133.42 kJ mol^-1


because this is exothermic, it needs to be negative, so can i just put the negative? or have i gone wrong in my calculations?

thanks for any help in advance!
Can't give any help because not enough information given - what data are you using and what is the precise question
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bellabella136
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I think you just put the sign in but no idea if ur answer is correct or not
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