The reaction given below is observed to be first order with rate constant `7.8xx10^(-3)" sec"^(-1)`. Calculate the time required for the total pressure in a system containing A at an initial pressure of 0.1 atm to rise to 0.145 atm and also find the total pressure after 100sec.
`2 A(g) rarr 4B (g) + C(g)`

Explanation

To solve the problem, we will follow these steps:

### Step 1: Understand the Reaction
The reaction is given as:
\[ 2 A(g) \rightarrow 4 B(g) + C(g) \]

### Step 2: Initial Conditions
- Initial pressure of A, \( P_A = 0.1 \, \text{atm} \)
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