If i apply 0.108 kj of energy in order to increase the temperature of a bar of gold from 30.0°c to 34.7°c, and the specific heat capacity of gold is 0.128 j/g°c, what is the mass the bar of gold in grams? a. 1.8 × 102 g b. 6.5 × 101 g c. 1.08 × 102 g d. 1.28 × 102 g e. none of these

The mass of the given gold bar: m = 1.8 × 10² g

Explanation:

The Specific heat capacity (c) of a given substance is defined as the heat capacity (C) per unit mass (m) or the energy required (Q) to increase the temperature (ΔT) of the given substance per unit mass.

∴ The specific heat capacity:

Given: The specific heat capacity of gold (Au) = 0.128 J/g°C

The increase in temperature: ΔT = 34.7°C - 30.0°C = 4.7°C

Heat energy: Q = 0.108 kJ = 0.108 × 1000 J = 108 J    (∵ 1 kJ = 1000J)

Mass of the given gold bar: m = ?

Therefore, the mass of the given gold bar:

Therefore, the mass of the given gold bar: m = 1.8 × 10² g

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.