it requires 350 joules to raise a certain amount of a substance from 10.0°c to 30.0°c. the specific heat of…

it requires 350 joules to raise a certain amount of a substance from 10.0°c to 30.0°c. the specific heat of the substance is 1.2 j/g°c. what is the mass of the substance? o 12 g o 15 g o 18 g o 30 g

it requires 350 joules to raise a certain amount of a substance from 10.0°c to 30.0°c. the specific heat of the substance is 1.2 j/g°c. what is the mass of the substance? o 12 g o 15 g o 18 g o 30 g

Answer

Explanation:

Step1: Calculate temperature change

$\Delta T=T_2 - T_1=30.0^{\circ}C - 10.0^{\circ}C = 20.0^{\circ}C$

Step2: Use heat - mass - specific heat formula

The formula for heat is $Q = mc\Delta T$, where $Q$ is heat, $m$ is mass, $c$ is specific heat, and $\Delta T$ is temperature change. We want to find $m$, so we can re - arrange the formula to $m=\frac{Q}{c\Delta T}$. Given $Q = 350\ J$, $c = 1.2\ J/g^{\circ}C$ and $\Delta T=20.0^{\circ}C$. Substitute the values: $m=\frac{350\ J}{1.2\ J/g^{\circ}C\times20.0^{\circ}C}=\frac{350}{24}\ g\approx14.58\ g\approx15\ g$

Answer:

15 g