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Answer : The mass of liquid sodium needed are,
Explanation :
First we have to calculate the number of moles of liquid sodium.
where,
q = heat absorb = 1.20 MJ = 1.20 × 10⁶ J
n = number of moles of liquid sodium = ?
c = specific heat capacity =
= change in temperature =
Now put all the given values in the above formula, we get:
Now we have to calculate the mass of liquid sodium.
Molar mass of Na = 23 g/mol
Therefore, the mass of liquid sodium needed are,