**Answer:**

0.167 kJ

**Explanation:**

The rise in the temperature of a substance or a material caused by absorbing the heat energy is given in an equation Q = m x c x ∆T, where:

Q is an amount of heat absorbed ( in Joules)

m is the mass of the substance (in kilograms)

c is specific heat capacity ( amount of heat per unit mass required to raise the temperature by one degree Celsius)

∆T is the difference in the temperature

So, m=10g which is 0.01kg; ∆T is 8°C - 4°C= 4°C; and c for water is constant value and is equal to 4186 J/kg C.

Now it's easy to calculate the amount of energy: Q=0.01x4186x4 which equals to 167.44 J, which is approximately 0.167 kJ

The explanation is in the picture

**Answer:**

.055 mol/L

**Explanation:**

Henry's Law is about solubility of a gas in a liquid which is dependent on the partial pressure of gas above the liquid . According to it

C = k P where C is concentration of gas in the liquid , k is henry's constant and P is partial pressure of the gas .

Given k = .159 mol/L.atm

P = 265 mm of Hg

= 265 / 760

= .34868 atm

C = kP

= .159 x .34868

= .055 mol/L