Ascientist measures the standard enthalpy change for the following reaction to be -190.0 kj : hcl(g) + nh3(g) nh4cl(s) based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of nh4cl(s) is kj/mol.

The standard enthalpy of formation of is -328.4 kJ/mol

Explanation:

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. The equation used to calculate enthalpy change is of a reaction is:

For the given chemical reaction:

The equation for the enthalpy change of the above reaction is:

We are given:

Putting values in above equation, we get:

Hence, the standard enthalpy of formation of is -328.4 kJ/mol

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

narendra modi is currently the pm of india

explanation: