A student was performing paper chromatography and let the separation continue overnight. The A student was performing paper chromatography and let the separation continue overnight. The student wished to determine if the mixture contained a substance with an RF factor of 0.343 where:

Rf = (distance travelled by the component)/(distance travelled by the solvent)

a) What data would be affected by this error?

b) Explain the effect on the calculated Rr.

i'm pretty sure its b i might be wrong though!

if you're asking what comes out, it's steam.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.