The specific heat capacity of silver is 0.24 j/°c ·g.(a) calculate the energy (j) required to raise thetemperature of 150.0 g ag from 273 kto 295 k.(b) calculate the energy required to raise the temperature of1.0 mol ag by 1.0°c (called the molar heat capacity of silver(j/mol°c)(c) it takes 1.15 kj of energy toheat a sample of pure silver from 12.0°c to 14.9°c. calculate the mass of the sample ofsilver (g).

(a)  792.0 J

(b)  25.89 J/molºC

(c)   1652 g

Explanation:

(a) We are given the specific heat for silver, and also know that

Q= mx c x ΔT,  where Q is the heat energy ,

                                    m is the mass ,

                                    c is the specific heat, and

                                    ΔT is the change in temperature.

We are given the specific heat , the mass and ΔT. So we have all that is required to calculate for Q, but first we will need to compute the temperature in º C since the specific heat is given in  Kelvin.

T₀ = (273 -273) ºC  = 0 ºC

T₁ = (295 - 273) ºC = 22 ºC

ΔT = (22 - 0) ºC = 22 ºC

Q = 150.0 g x 0.24 J/ºC·g x ( 22 ºC) = 792.0 J

(b) We know the specific heat per gram, and we need to calculate the molar heat capacity per mol. So our strategy here is to convert the given specifi heat to molar heat capacity:

0.24 J /ºC·g x 107.87 g/mol = 25.89 J/molºC

(c) In this part we need to calculate the mass given the heat energy and the change in temperature. Since we want our answer in grams, we will be using the specific heat of  0.24 J/ºC·g. Again convert Q to J to be consistent in our units.

Q = 1.15 kJ x 1000 J/kj = 1150 J

Q = m x c x ΔT ⇒ m = Q / (c x ΔT)

m = 1150 J / (0.24 J/°C ·g x (14.9 - 12.0)ºC) = 1652 g

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.