Answer: A) The reaction is spontaneous above 276 K.
Explanation:
According to Gibb's equation:
= Gibbs free energy
= enthalpy change = +29.3 kJ/mol =29300 J/mol
= entropy change = +106 J/molK
T = temperature in Kelvin
= +ve, reaction is non spontaneous
= -ve, reaction is spontaneous
= 0, reaction is in equilibrium
for reaction to be spontaneous
Thus the Reaction is spontaneous when temperature is above 276 K.
The answer is B. -<span>heat only transfers from your hand to the ice</span>
Answer is: group 17 on the periodic table.
Group 17 (halogens) elements are: fluorine (F), chlorine (Cl), bromine (Br) and iodine (I).
They are very reactive and easily form many compounds.
Fluorine and chlorine are in gaseous state, bromine is liquid and iodine is in solid state in room temperature.
Halogens need to gain one electron to have electron cofiguration like next to it noble gas.
For example, fluorine has 9 electrons and it gain easily one electron in chemical reaction to have electron configuration like noble gas neon (Ne) with 10 electrons.
The answer is starch because iodine reacts with starch to change the colour to inky blue or black.
All the others are present in milk naturally so I’m assuming they intent starch
