Answer:
D) The water will freeze into cubes again.
Explanation:
When the ice cubes is left on a counter, it will melt as the forces that make its molecules stick together is broken.
If that tray is put back in the freezer again, the water will freeze into cubes again.
When water freezes, the molecules slow down and settle into its place, arranging in a regular shape that can be appeared as crystals (ice cubes).
Because they have positive and negative sides, the oxygen and hydrogen atoms have a polar arrangement.
Answer:
is the change in enthalpy associated with the combustion of 530 g of methane.
Explanation:
Mass of methane burnt = 530 g
Moles of methane burnt =
Energy released on combustion of 1 mole of methane = -890.8 kJ/mol
Energy released on combustion of 33.125 moles of methane :
is the change in enthalpy associated with the combustion of 530 g of methane.
Answer:
See below.
Explanation:
Sucrose - negative because this is not a reducing sugar.
Lactose, Maltose, Fructose and Glucose - positive as they are reducing sugars..
Reducing sugars have a free aldehyde or ketone group whereas non-reducing sugars do not.
Answer:-
240.558 K
Explanation:-
Number of Moles n = 1
Pressure P = 20 kilopascals = 20 KPa
Volume V = 100 L
We know Universal Gas constant R = 8.314 L kPa K−1 mol−1
Using the relation
PV = nRT
Temperature T = P x V / ( n x R)
T = 20 KPa x 100 L / ( 1 mol x 8.314 L kPa K−1 mol−1 )
= 240.558 K