Heat energy = MCΔT; where m is the mass, c is the specific heat capacity; while ΔT is the change in temperature.
Mass is 100 g , while change in temperature 50°C and heat energy is 23.5 kJ or 23500 j
Hence; 23500 = 100 × c ×50
c = 23500/5000
= 4.7 j/g/°c or 4700 J/Kg/°C
The substance is ammonia since it has the specific heat capacity is 4.7 J/g/°C
The much hydrogen that is produced is 0.02 mol of H₂ (answer B)
Explanation
2K +2H₂O→ 2 KOH + H₂
Use the mole ratio to determine the moles of H₂
From equation above the K :H₂ is 2:1
Therefore the moles of H₂ = 0.04 x 1/2 = 0.02 mol of H₂
The NH3, as it was the acid in the beginning and donated a proton to become more basic.
The attraction of metal ions for mobile electrons