What are the physical and chemical properties of gold?

Physical property

It s a soft, ductile metal.

Gold has a very high boiling and melting point.

It s a good conductor of electricity and heat.  

Gold will not tarnish.

Gold is a noble metal.  

Gold is highly reflective.  

Gold is very heavy and dense.

Chemical Property

Atomic number-79

Electronegativity according to Pauling-2.4

Density-19.3 g.cm-3 at 20°C

Melting point-1062 °C

Boiling point-2000 °C

Explanation:

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :