how much heat is required to raise the temperature of one mole of NaCl(s) by 15 degrees celsius at constant pressure
To calculate the heat required to raise the temperature of a substance, we can use the formula:
q = mcΔT
where:
q is the heat (in Joules),
m is the mass of the substance (in grams),
c is the specific heat capacity of the substance (in Joules per gram per degree Celsius),
ΔT is the change in temperature (in degrees Celsius).
To determine the heat required to raise the temperature of one mole of NaCl(s) by 15 degrees Celsius, we need to know the specific heat capacity for NaCl and its molar mass.
The molar mass of NaCl is the sum of the atomic masses of sodium (Na) and chlorine (Cl), which is approximately 58.44 grams per mole.
The specific heat capacity of NaCl(s) is approximately 0.864 J/g°C.
First, we need to convert the molar mass of NaCl to grams:
Molar mass of NaCl = 58.44 g/mol
Next, we need to calculate the mass of one mole of NaCl:
Mass of one mole of NaCl = molar mass = 58.44 g/mol
Finally, we can plug these values into the formula:
q = mcΔT
q = (58.44 g/mol) * (0.864 J/g°C) * (15°C)
Calculating this expression will give us the amount of heat required to raise the temperature of one mole of NaCl(s) by 15 degrees Celsius at constant pressure.