Physics - Heat and Temperature: 1.
ΔU = ? Q = -30 kJ W = -40 kJ
ΔU = 10 kJ

2.
ΔU = ? Q = -72kJ W = -12kJ
ΔU = -60 kJ

Question

1.
ΔU = ?   Q = -30 kJ   W = -40 kJ
ΔU  = 10 kJ

2.
ΔU = ?   Q = -72kJ  W = -12kJ
ΔU = -60 kJ

Lauren Noack · Accepted Answer

Calculations

Lauren Noack · Answer

1. A 1 L beaker of water has 40 kJ of work done on it and it also loses 30 kJ of thermal energy to the surroundings. What is the change in energy of the water?

Lauren Noack · Answer

2. A 1 L beaker of water has 12 kJ of work done on it and it also loses 72 kJ of thermal energy to the surroundings. What is the change in energy of the water?

Lauren Noack · Answer

3. A 1 L beaker of water has 35 kJ of work done by it and it also loses 15 kJ of thermal energy to the surroundings. What is the change in energy of the water?

Lauren Noack · Answer

4. A 1 L beaker of water has 27 kJ of work done by it and the change in energy of the water is 64 kJ. What was he value and sign of the thermal energy in this system?

Physics - Heat and Temperature

1. ΔU = ? Q = -30 kJ W = -40 kJ ΔU = 10 kJ 2. ΔU = ? Q = -72kJ W = -12kJ ΔU = -60 kJ

Calculations

Autor