Question

Assume centre of sun to consist of gases whose average molecular weight is 2. The density and pressure of the gas are $1.3g{cc}^{-1}$ and $1.12\times {10}^9$ atm respectively. The temperature of sun is:

• A. $2\times {10}^{3}K$
• B. $2\times {10}^{5}K$
• C. $2\times {10}^{7}K$
• D. $2\times {10}^{9}K$

Answer 1

The correct option is C $2\times {10}^{7}K$

We know tha, $P=\frac{dRT}{m}$

Placing the values provided in the question, we get,

$T=\frac{Pm}{dR}$

$=\frac{1.12\times {10}^9\times 2}{1.3\times 1000\times 0.0821}$

$⟹T=2.076\times {10}^{7}K$