 
 <prompt> text: ```For chemistry, di standard state of a material (pure substance, mixture or solution) na reference point wey dem dey use calculate im properties under different conditions. In principle, di choice of standard state dey arbitrary, even though di International Union of Pure and Applied Chemistry (IUPAC) dey recommend one conventional set of standard states for general use. IUPAC dey recommend make dem use standard pressure "p" = 10 Pa. Strictly speaking, temperature no dey part of di definition of standard state. For example, as we go discuss later, di standard state of gas na conventionally chosen to be unit pressure (usually in bar) ideal gas, regardless of di temperature. However, most tables of thermodynamic quantities dey compiled at specific temperatures, most commonly or, somewhat less commonly.

Di standard state no suppose dey confused with standard temperature and pressure (STP) for gases, nor with di standard solutions wey dem dey use for analytical chemistry.

For one particular material or substance, di standard state na di reference state for di material's thermodynamic state properties like enthalpy, entropy, Gibbs free energy, and for many other material standards. Di standard enthalpy change of formation for one element for im standard state na zero, and dis convention allow make plenty other thermodynamic quantities fit dey calculated and tabulated. Di standard state of one substance no need to dey exist for nature: for example, e fit dey possible to calculate values for steam at 298.15 K and 10 Pa, even though steam no dey exist (as gas) under these conditions. Di advantage of dis practice na say tables of thermodynamic properties wey dem prepare like dis dey self-consistent.

What be di answers to dis following set of questions:

1. wetin be di standard state of one material?

Numbered answers:``` <response>: ```1. one point wey dem dey use as reference to calculate im properties under different conditions``` 