How many statement are false ?
(i) Thermodynamics is concerned with total energy of the system.
(ii) `1^(st)` law of thermodynamics can be applied on the individual particle enclosed in vessel.
(iii) Many thermodynamic properties can not be measured absolutely, so change in thermodynamics property is required for calculation.
(iv) Feasibility of any chemical reaction can not be explained by thermodynamics.
(v) When surrounding is always in equilibrium with the system, the process called reversible.
(vi) Thermodynamics predict the time of attain the equilibrium

Explanation

To determine how many statements are false, let's analyze each statement one by one:

1. **Statement (i)**: "Thermodynamics is concerned with total energy of the system."
- **Analysis**: This statement is **false**. Thermodynamics is concerned with the total energy of the universe, not just the system.

2. **Statement (ii)**: "1st law of thermodynamics can be applied on the individual particle enclosed in a vessel."
- **Analysis**: This statement is **false**. The first law of thermodynamics applies to the entire system, not just an individual particle.

3. **Statement (iii)**: "Many thermodynamic properties cannot be measured absolutely, so change in thermodynamic property is required for calculation."
- **Analysis**: This statement is **true**. It is indeed true that many thermodynamic properties cannot be measured absolutely, and thus changes in these properties are used for calculations.

4. **Statement (iv)**: "Feasibility of any chemical reaction cannot be explained by thermodynamics."
- **Analysis**: This statement is **false**. Thermodynamics can explain the feasibility of chemical reactions through concepts like Gibbs free energy and equilibrium.

5. **Statement (v)**: "When surrounding is always in equilibrium with the system, the process is called reversible."
- **Analysis**: This statement is **true**. A reversible process is defined as one where the system is in equilibrium with its surroundings.

6. **Statement (vi)**: "Thermodynamics predicts the time of attain the equilibrium."
- **Analysis**: This statement is **false**. Thermodynamics does not provide information about the time it takes to reach equilibrium.

### Summary of False Statements:
- Statement (i): False
- Statement (ii): False
- Statement (iii): True
- Statement (iv): False
- Statement (v): True
- Statement (vi): False

### Total False Statements:
There are **four false statements**: (i), (ii), (iv), and (vi).

### Final Answer:
**4 statements are false.**

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