Answer:
Standard conditions of temperature and pressure for a thermochemical equation are 0°C and 101 kPa.
Explanation:
The complete question is with options, as follows:
"Standard conditions of temperature and pressure for a thermochemical equation are _____.
0C and 101 kPa.
25C and 101 kPa.
0C and 0 kPa.
25C and 22.4 kPa."
The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
On the other side, 1 atmposphere (atm) equals 101.325 kilopascal (kPa).
So, finally, Standard conditions of temperature and pressure for a thermochemical equation are 0°C and 101 kPa.
