A 30.0 g sample of a metal is heated to 200 C and placed in a calorimeter containing 75.0 grams of water at 20.0 C. After the metal and water reach thermal equilibrium, the thermometer on the calorimeter reads 34.30 C. What is the specific heat of the metal? CH2O = 4.184 J/gC

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

the answer is d.) potassium