The temperature of a system rises by 45°C during a heating process. Express this rise in temperature in Kelvin. (Round the final answer to the nearest whole number.)

45K

Explanation:

Rise in temperature = Final - initial temperature.

temperature in K = Temperature in Celsius + 273

for Celsius; T2 - T1 = 45°C

for kelvin; T2+273 - (T1+273) = ?

T2+273 - T1-273 = ?

T2-T1 = ?

T2-T1 = 45k

hence ΔT (K) = ΔT (°C) (temperature difference in Celsius is equal to temperature difference in kelvin)