WILL GIVE BRAINLIEST PLEASE

1. An amount of heat equal to 10.5 x 105 J is supplied to 5 kg of water to raise its temperature from 25°C to 75°C. What is the specific heat capacity of water?

4.2 J/kg.°C

4200 J/kg.°C

1000 J/kg.°C

4200 kcal/kg.°C

2. What is the heat required in kilocalories to convert 2 kg of ice at 0°C completely into steam at 100°C?

80 Calories

1440 Calories

4186 Calories

540 Calories

3. How many kg of ice needs to be added to 1.31 kg of water at 64.9°C to cool the water to 14.9°C when the Latent heat of ice = 80 kcal/kg?

0.69

6.9

690

6900

4. 540 g of ice at 0°C is mixed with 540 g of water at 80°C. What is the final temperature of the mixture?

0°C

40°C

80°C

less than 0°C

5. If ∆Q is the heat supplied to a gas so that the internal energy of the system increases by ∆U, then the work done ∆W by the gas is equal to:

∆Q – ∆U

∆Q + ∆U

∆Q x ∆U

∆U/∆Q

6. The internal energy of the gas in a gasoline engine cylinder decreases by 210 J. If 60 J of work is done by the gas, the energy transferred as heat is:

270 J

150 J

-150 J

-270 J

7. A gaseous refrigerant undergoes compression over 160 J of work done on it. If the internal energy of the gas increases by 130 J, the amount of heat transfer is:

290 J

-290 J

30 J

-30 J