How much heat is required to raise the temperature of 29.6 g of water from −55 °C to 125 °C?

Explanation

we know that

Δ H= m C ΔT

where

ΔH = change in enthalpy (j)

m=mass of the given substance which in this case is water

C= specific heat capacity

ΔT=change in temperature

we know that given mass of water =29.6 g

and ΔT=T2-T1=125-(-55)=180

specific heat capacity of water is 4.18 j/g °C

therefore ΔH= 29.6 g*4.18 j/g °C* 180 °C

so ΔH=22271.04 j

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.