The heats evolved in combustion of rhombic and monoclinic sulphur are, respectively, `-70960` and `-71030 cal`. What will be the heat of conversion of rhomic sulphur to monoclinic?

Options

A. `70960 cal`
B. `71030 cal`
C. `-70 cal`
D. `+70 cal`

Explanation

To find the heat of conversion of rhombic sulfur to monoclinic sulfur, we can use the heats of combustion provided for both forms of sulfur. The heat of conversion can be calculated using the following formula:

\[ \Delta H_{\text{conversion}} = \Delta H_{\text{combustion (rhombic)}} - \Delta H_{\text{combustion (monoclinic)}} \]

### Step-by-Step Solution:

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