Question

A sample of zinc is heated to a temperature of 77.4ºC, then placed in a calorimeter containing 65.0 g of water. Temperature of water increases from 20.00ºC. The specific heat of zinc is 0.390 j/g°C. What was the mass of the zinc sample?

Answer 1

180.189 g was the mass of the zinc sample with a specific heat of zinc is 0.390 j/g°C.

What is specific heat capacity?

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

Using specific heat capacity formula here:

$C_{Zn}$ × $m_{Zn}$×  Δ$T_{Zn}$ = $C_{H_2O}$× $m_{H_2O}$ ×  Δ$T_{H_2O}$

0.390J/g°C × $m_{Zn}$ ×77.4ºC = 4.184J/g°C×  65.0g ×  20.00ºC.

$m_{Zn}$ = 180.189 g

Hence, 180.189 g was the mass of the zinc sample.

Learn more about the specific heat capacity here:

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