# Probability / Energy question

1. May 25, 2008

### raintrek

1. The problem statement, all variables and given/known data

- Initial conformational potential energy = 2500 J
- NVT Metropolis Monte Carlo simulation, T = 300 K
- New conformational potential energy = 5000 J

What's the probability this will be accepted within the Metropolis scheme?

2. Relevant equations

Acceptance Probability:
$$P=exp\left(\frac{-\Delta U_{mn}}{kT}\right)$$

$$\Delta U_{mn}=U(q_{n}^{N})-U(q_{m}^{N})$$

where $$U(q_{m}^{N})$$ is our initial potential and $$U(q_{n}^{N})$$ is our final potential.

3. The attempt at a solution

I'm plugging these numbers in, but the exponent is going to zero, which I know to be wrong. Is there some conversion of energy I'm missing? Seems a bit odd...