Defining System

Defining System
Can anyone help, define a system and it’s surroundings and give the direction of heat transfer 4 the following?

1) Propane is burning in a Bunsen burner in the laboratory.
2) After you have a swim, water droplets on your skin evaporate.
3) Water, originally at 25°C, is places in the freezing compartment of a refrigerator.
4) Two chemicals are mixed in a flask on a laboratory bench. A reaction occurs and heat is evolved.

Will rate the highest for best answer

1) Propane is burning in a Bunsen burner in the laboratory.
a) System is the burner, its fuel, and oxygen
b) Surroundings are the what it is heating and the lab

2) After you have a swim, water droplets on your skin evaporate.
a) System: your skin, the water molecules
b) Surround: the air (room) around you

3) Water, originally at 25°C, is places in the freezing compartment of a refrigerator.
System: The water and ice cube tray
Surround: The freezer

4) Two chemicals are mixed in a flask on a laboratory bench. A reaction occurs and heat is evolved.
System: the two chemicals, the water that they are in, and the flask
Surround: the rest of the lab

Davines Defining System Shine Drops 30ml/1oz $33.50

Davines Defining System Artifixture Style Gel 150ml/5o $22.00

Davines Defining System Relaxing Fluid 150ml/5.07oz $19.00

Davines Defining System Shaping Gel 250ml/8.45oz $20.00

MATRIX Curl.life Defining System Conditioner 13.5oz $7.99

Davines Defining System Invisible Honey Gel 150ml/5.07 $28.00

MOP C System C-Curl Defining Cream 5.1oz Lot(12) $170.75

MATRIX Curl Life Defining System Shampoo 17oz/500ml $19.95

Davines Defining System Relaxing Fluid 150ml/5.07oz $19.00

Davines Defining System Shaping Gel 250ml/8.45oz $20.00

Davines Defining System Shine Drops 30ml/1oz $33.50

Davines Defining System Artifixture Style Gel 150ml/5o $22.00

2 Davines Defining System Glam Power Spray 13.44oz $9.99

Davines Defining System Invisible Honey Gel 150ml/5.07 $28.00

10 Matrix Curl Life Defining System SHAMPOO NEW 4.2oz $39.99

Davines Defining System Invisible Honey Gel 150ml/5.07 $28.00

Davines Defining System Artifixture Style Gel 150ml/5o $22.00

Davines Defining System Relaxing Fluid 150ml/5.07oz $19.00

Davines Defining System Shine Drops 30ml/1oz $33.50

Davines Defining System Wonder Wax 100ml/3.3oz $28.00

Davines Defining System Relaxing Fluid 150ml/5.07oz $19.65

Davines Defining System Shine Drops 30ml/1oz $34.38

Davines Defining System Artifixture Style Gel 150ml/5o $22.33

Davines Defining System Shaping Gel 250ml/8.45oz $20.00

Davines Defining System Shaping Gel 250ml/8.45oz $20.54

Davines Defining System Invisible Honey Gel 150ml/5.07 $28.58

Davines Defining System Shine Drops 30ml/1oz $33.50

Davines Defining System Artifixture Style Gel 150ml/5o $22.00

Davines Defining System Relaxing Fluid 150ml/5.07oz $19.00

Davines Defining System Protein Sculpting Lotion 250ml $22.00

Abortion coverage dispute divided House Democrats Just when President Barack Obama seeks to unite the Democratic lawmakers for a final push to pass health reform, the division's policy on abortion threatens to split the party.