The heat of ionisation of formic acid is 1.5 kJ/ mol. 9.2 g formic acid on reaction with 7 g ammonium hydroxide gives 10.8 kJ of heat. Calculate the heat of ionisation of ammonium hydroxide. (1cal=4.2J)

Explanation

To solve the problem of calculating the heat of ionization of ammonium hydroxide (NH4OH) based on the provided information, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Data:**
- Heat of ionization of formic acid (HCOOH): \( \Delta H_{HCOOH} = 1.5 \, \text{kJ/mol} \)
- Mass of formic acid: \( m_{HCOOH} = 9.2 \, \text{g} \)
- Mass of ammonium hydroxide: \( m_{NH4OH} = 7 \, \text{g} \)
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