Question

The density of a gas at 27${}^o$ C and 1 atm is d. At what temperature will its density become 0.75 d at constant pressure?

• A. 273 K
• B. 350 K
• C. 400 K
• D. 300 K

Answer 1

The correct option is C 400 K

As we know,
P = $\frac{dRt}{M_w}$

At constant pressure,
d${}_1$T${}_1$ = d${}_2$T${}_2$

d $\times$ 300 = 0.75 d $\times$ T${}_2$

T${}_2$ = 100 $\times$ 4 $=$ 400 K

Hence, option C is correct.