1.

In an endothermic reaction, the value of DeltaH is

Answer»

zero
POSITIVE
negative
constant

Solution :For endothermic reactions standard heat of reaction `(DeltaH)` is positive because in these reactions total ENERGY of reactants is lower than that of PRODUCTS , i.e., `E_(R) lt E_(P)`
So,`DeltaH=E_(P)-E_(R)=+ve`


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