Question 444: Thermodynamics & KTG

Question

200 g water is heated from 40
o
C to 60
o
C. Ignoring the slight expansion of water, the change in its internal energy is close to (Given specific heat of water = 4184 J/kg/K) :

Accepted Answer

According to the first law of thermodynamics,
Q = $$\Delta $$u + w
For isochoric process Q = $$\Delta $$U = ms$$\Delta $$t
$$\Delta $$T = (233 $$-$$ 213) = 20 k
$$ 	herefore $$   $$\Delta $$u = 0.2 $$ 	imes $$ 4184 $$ 	imes $$ 20 = 16.7 kJ

Answer

8.4 kJ

Answer

4.2 kJ

Answer

16.7 kJ

Answer

167.4 kJ

Thermodynamics & KTG

200 g water is heated from 40 o C to 60 o C. Ignoring the slight expansion of water, the change in its internal energy is close to (Given specific heat of water = 4184 J/kg/K) :

Choose the correct answer: