Question

1. What is the heat required in kilocalories to convert 2 kg of ice at 0°C completely into steam at 100°C? (I thought it was 2000 kilo cals but I think I'm wrong??)

a. 80 Calories
b. 1440 Calories
c. 4186 Calories
d. 540 Calories


2. 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 what?

a. 290 J
b.-290 J
c. 30 J
d. -30 J

Thanks SO much!!
Jay
1440