A student takes 50 g wax (specific heat = 0.6 kcal/kg°C) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are, respectively

Question

A student takes 50 g wax (specific heat = 0.6 kcal/kg°C) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are, respectively (A) 500 cal, 50°C (B) 1000 cal, 100°C (C) 1500 cal, 200°C (D) 1000 cal, 200°C

Tardigrade Admin · Accepted Answer

Since specific heat = 0.6 kcal/g × °C = 0.6 cal/g × °C From graph it is clear that in a minute, the temperature is raised from 0°C to 50°C. ⇒ Heat required for a minute = 50 × 0.6 × 50 = 1500 cal. Also from graph, Boiling point of wax is 200°C.

Q. A student takes $50 g$ wax (specific heat $= 0.6 k c a l / k g^{\circ} C)$ and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are, respectively

$500 c a l, 5 0^{\circ} C$

$1000 c a l, 10 0^{\circ} C$

$1500 c a l, 20 0^{\circ} C$

$1000 c a l, 20 0^{\circ} C$

Q. A student takes 50g wax (specific heat =0.6kcal/kg∘C) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are, respectively

500cal,50∘C

1000cal,100∘C

1500cal,200∘C

1000cal,200∘C

Since specific heat =0.6kcal/g×∘C =0.6cal/g×∘C From graph it is clear that in a minute, the temperature is raised from 0∘C to 50∘C. ⇒ Heat required for a minute =50×0.6×50=1500cal. Also from graph, Boiling point of wax is 200∘C.

Q. A student takes $50 g$ wax (specific heat $= 0.6 k c a l / k g^{\circ} C)$ and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are, respectively

$500 c a l, 5 0^{\circ} C$

$1000 c a l, 10 0^{\circ} C$

$1500 c a l, 20 0^{\circ} C$

$1000 c a l, 20 0^{\circ} C$