Question

1. a liquid sample in a science experiment starts at a room temperature heat of 21°c, and is heated until it reaches 95°f.

a) convert the start and end temperatures both to kelvin.

Explanation:

Step1: Convert 21°C to Kelvin

The formula to convert Celsius to Kelvin is $K = ^\circ C + 273.15$.
$K = 21 + 273.15$

Step2: Calculate initial Kelvin temp

$21 + 273.15 = 294.15$

Step3: Convert 95°F to Celsius

The formula to convert Fahrenheit to Celsius is $^\circ C = \frac{5}{9}(^\circ F - 32)$.
$^\circ C = \frac{5}{9}(95 - 32)$

Step4: Calculate Celsius value

$\frac{5}{9}(63) = 35$

Step5: Convert 35°C to Kelvin

$K = 35 + 273.15$

Step6: Calculate final Kelvin temp

$35 + 273.15 = 308.15$

Answer:

Start temperature (Kelvin): $294.15$ K
End temperature (Kelvin): $308.15$ K