Kales

Match the following units to their correct property: A. Density of Solution B. Heat Capacity C. Molarity D. Specific Heat 1. J/g•oC 2. J/oC 3. g/ml 4. cal/g•oC

When 2.25 g of sodium hydroxide (NaOH) was dissolved in 150.00 g of water a value of 11.00oC was obtained for ΔT. 1. Calculate the molarity of the sodium hydroxide solution. 2. Calculate the value (calories) for the heat of solution of 2.25 g of NaOH. 3....

Find the change in internal energy for this reaction. Enter in kJ. 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l) Enthalpy of reaction= -2599 kJ

A home swimming pool contains 145 m3 of water. At the beginning of the swimming season, the water must be heated from 20 to 32°C. How many joules of heat energy must be supplied?

A 0.84 g sample of caffeine, C8H10N4O2, burns in a constant-volume calorimeter that has a heat capacity of 7.85 kJ/K. The temperature increases from 298.30 K to 303.35 K. What is the molar heat of combustion of caffeine (in kJ).

A piece of aluminum with mass of 5.0 g is immersed in 30.0 g of water. This system is heated electrically from 20.8 to 42.6°C. How many joules of energy are absorbed by the aluminum? (Cpaluminum = 24.4 J/mol-K; 1 mole of aluminum has a mass of 27.0 g)

Constant-volume calorimeters are sometimes calibrated by running a combustion reaction of known ΔE and measuring the change in temperature. For example, the combustion energy of glucose is 15.57 kJ/g. When a 2.500 g sample of glucose burns in a constant v...

It requires 120 J of heat to raise the temperature of 70.0 g of rhodium from 280.0 K to 287.8 K. What is the molar heat capacity of rhodium?

A mouse is placed in a sealed chamber with air at 755.0 torr. This chamber is equipped with enough solid KOH to absorb any CO2 and H2O produced by the mouse. The gas volume in this chamber is measured to be exactly 1.70 L, the temperature is held constant...

Microwave ovens heat food by creating microwave electromagnetic radiation that is absorbed by water molecules in the food. Any material that does not have water in it will not absorb the radiation and will not get hot. Metals reflect the microwaves from t...

Which of the following sets of quantum numbers could possibly describe an electron in the ground-state configurations of beryllium. Choose all that apply (e.g. AB, ABC, ABDF). A) n=1 l=0 ml=0 ms=1/2 B) n=3 l=1 ml=-1 ms=1/2 C) n=2 l=0 ml=0 ms=-1/2 D) n=2 l...

1.D 2.B 3.A 4.D

And How many joules of energy are absorbed by the water?

The process for #2 didn't work. I got found the answer to be -1590 but I'm not sure how to get that answer